Auto merge of #116081 - compiler-errors:closure-captures-sized, r=cjgillot

Check that closure/generator's interior/capture types are sized

check that closure upvars and generator interiors are sized. this check is only necessary when `unsized_fn_params` or `unsized_locals` is enabled, so only check if those are active.

Fixes #93622
Fixes #61335
Fixes #68543

Author: bors