[Sentinel] [DataConnectors+ Entities] Live Validation Correctness fix (#12498)

* Correctness  fix

* remove nuulable property

* fix incorrect property

* fix required properties

* fix merge conflict

* add custom words for spell check

* fix to camel case

* change to camel case

* fic enum name

* remove duplicate enum

Author: sagamzu

custom-words.txt

@@ -1085,6 +1085,7 @@ msixpackages
 MSIXpackages
 MSLISTSTATUS
 MSMCAZR
+MSTI
 mucho
 multiapi
 Multiclass
@@ -1755,6 +1756,7 @@ swappiness
 Swappiness
 switchprotection
 Sybase
+Syncer
 syncfunctiontriggers
 synonymmaps
 syntheticmonitorlocations