gh-20360: Update message_registry.py

[hyperkai]

I solved #20360.

From:

error: Cannot use a covariant type variable as a parameter

To:

error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self

[github-actions]

Diff from mypy_primer, showing the effect of this PR on open source code:

steam.py (https://github.com/Gobot1234/steam.py)
- steam/invite.py:77: error: Cannot use a covariant type variable as a parameter  [misc]
+ steam/invite.py:77: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
- steam/invite.py:78: error: Cannot use a covariant type variable as a parameter  [misc]
+ steam/invite.py:78: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
- steam/app.py:524: error: Cannot use a covariant type variable as a parameter  [misc]
- steam/app.py:593: error: Cannot use a covariant type variable as a parameter  [misc]
+ steam/app.py:524: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
+ steam/app.py:593: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
- steam/profile.py:194: error: Cannot use a covariant type variable as a parameter  [misc]
+ steam/profile.py:194: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
- steam/profile.py:273: error: Cannot use a covariant type variable as a parameter  [misc]
+ steam/profile.py:273: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
- steam/abc.py:298: error: Cannot use a covariant type variable as a parameter  [misc]
+ steam/abc.py:298: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
- steam/abc.py:1015: error: Cannot use a covariant type variable as a parameter  [misc]
- steam/abc.py:1017: error: Cannot use a covariant type variable as a parameter  [misc]
+ steam/abc.py:1015: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
+ steam/abc.py:1017: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
- steam/post.py:30: error: Cannot use a covariant type variable as a parameter  [misc]
+ steam/post.py:30: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
- steam/comment.py:52: error: Cannot use a covariant type variable as a parameter  [misc]
+ steam/comment.py:52: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
- steam/comment.py:54: error: Cannot use a covariant type variable as a parameter  [misc]
+ steam/comment.py:54: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
- steam/leaderboard.py:81: error: Cannot use a covariant type variable as a parameter  [misc]
+ steam/leaderboard.py:81: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
- steam/leaderboard.py:89: error: Cannot use a covariant type variable as a parameter  [misc]
+ steam/leaderboard.py:89: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]

ibis (https://github.com/ibis-project/ibis)
- ibis/expr/datatypes/core.py:1006: error: Cannot use a covariant type variable as a parameter  [misc]
+ ibis/expr/datatypes/core.py:1006: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
- ibis/expr/datatypes/core.py:1030: error: Cannot use a covariant type variable as a parameter  [misc]
+ ibis/expr/datatypes/core.py:1030: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
- ibis/expr/datatypes/core.py:1032: error: Cannot use a covariant type variable as a parameter  [misc]
+ ibis/expr/datatypes/core.py:1032: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
- ibis/expr/operations/generic.py:141: error: Cannot use a covariant type variable as a parameter  [misc]
+ ibis/expr/operations/generic.py:141: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
- ibis/common/tests/test_patterns.py:256: error: Cannot use a covariant type variable as a parameter  [misc]
+ ibis/common/tests/test_patterns.py:256: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
- ibis/common/tests/test_patterns.py:257: error: Cannot use a covariant type variable as a parameter  [misc]
+ ibis/common/tests/test_patterns.py:257: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
- ibis/common/tests/test_grounds.py:129: error: Cannot use a covariant type variable as a parameter  [misc]
+ ibis/common/tests/test_grounds.py:129: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
- ibis/common/tests/test_grounds.py:220: error: Cannot use a covariant type variable as a parameter  [misc]
+ ibis/common/tests/test_grounds.py:220: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
- ibis/common/tests/test_grounds.py:221: error: Cannot use a covariant type variable as a parameter  [misc]
+ ibis/common/tests/test_grounds.py:221: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]

Expression (https://github.com/cognitedata/Expression)
- expression/core/result.py:60: error: Cannot use a covariant type variable as a parameter  [misc]
+ expression/core/result.py:60: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
- expression/core/result.py:61: error: Cannot use a covariant type variable as a parameter  [misc]
+ expression/core/result.py:61: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]
- expression/core/option.py:53: error: Cannot use a covariant type variable as a parameter  [misc]
+ expression/core/option.py:53: error: Cannot use a covariant type variable as a parameter except for __init__, __new__, and instance method's self  [misc]

[A5rocks]

Linked issue was closed. Feel free to make a PR fixing something else!