Fixed a bug that leads to a false positive error in the `reportIncomp…

[erictraut]

…atibleMethodOverridecheck when a child class is overriding an overloaded method in the base class and one or more of the overloads doesn't apply because theselforcls` parameter is explicitly annotated in a way that's not applicable to the child class. This addresses #5288.

[github-actions]

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

steam.py (https://github.com/Gobot1234/steam.py)
+       "Type[Message[UserT@Message]]" is incompatible with "Type[ChatMessage[AuthorT@ChatMessage, MemberT@ChatMessage]]"
+       Type "Type[Message[UserT@Message]]" cannot be assigned to type "Type[ChatMessage[AuthorT@ChatMessage, MemberT@ChatMessage]]"
-           Type "AuthorT@ChatMessage" cannot be assigned to type "UserT@Message" (reportIncompatibleMethodOverride)
+     ... (reportIncompatibleMethodOverride)
-     Parameter "id" is missing in override (reportIncompatibleMethodOverride)
+     Parameter "id" is missing in override
+       "Type[ChatGroup[MemberT@ChatGroup, ChatT@ChatGroup, ChatGroupTypeT@ChatGroup]]" is incompatible with "Type[Clan]"
+       Type "Type[ChatGroup[MemberT@ChatGroup, ChatT@ChatGroup, ChatGroupTypeT@ChatGroup]]" cannot be assigned to type "Type[Clan]" (reportIncompatibleMethodOverride)
-     Parameter "**kwargs" has no corresponding parameter (reportIncompatibleMethodOverride)
+     Parameter "**kwargs" has no corresponding parameter
+       "_IOMixin" is incompatible with "ManifestPath" (reportIncompatibleMethodOverride)
-     Parameter "**kwargs" has no corresponding parameter (reportIncompatibleMethodOverride)
+     Parameter "**kwargs" has no corresponding parameter
+       "_IOMixin" is incompatible with "ManifestPath" (reportIncompatibleMethodOverride)
+       "Type[Message[UserT@Message]]" is incompatible with "Type[UserMessage[UserMessageAuthorT@UserMessage]]"
+       Type "Type[Message[UserT@Message]]" cannot be assigned to type "Type[UserMessage[UserMessageAuthorT@UserMessage]]"
-     Parameter "**kwargs" has no corresponding parameter (reportIncompatibleMethodOverride)
+     Parameter "**kwargs" has no corresponding parameter
+       "_IOMixin" is incompatible with "Award" (reportIncompatibleMethodOverride)
+       "collections.ChainMap" is incompatible with "steam.utils.ChainMap"
+       "dict[_KT@dict, _VT@dict]" is incompatible with "ConverterDict"
+       "Mapping[_KT@Mapping, _VT_co@Mapping]" is incompatible with "CaseInsensitiveDict[_VT@CaseInsensitiveDict]"
-     Positional parameter count mismatch; base method has 4, but override has 2 (reportIncompatibleMethodOverride)
+     Positional parameter count mismatch; base method has 4, but override has 2
+       "GCMessage" is incompatible with "CraftResponse" (reportIncompatibleMethodOverride)
-     Positional parameter count mismatch; base method has 4, but override has 2 (reportIncompatibleMethodOverride)
+     Positional parameter count mismatch; base method has 4, but override has 2
+       "GCMessage" is incompatible with "CacheSubscribedCheck" (reportIncompatibleMethodOverride)
-     Positional parameter count mismatch; base method has 3, but override has 2 (reportIncompatibleMethodOverride)
+     Positional parameter count mismatch; base method has 3, but override has 2
+       "Message" is incompatible with "ClientGetLegacyGameKeyResponse" (reportIncompatibleMethodOverride)
-     Positional parameter count mismatch; base method has 3, but override has 2 (reportIncompatibleMethodOverride)
+     Positional parameter count mismatch; base method has 3, but override has 2
+       "Message" is incompatible with "ClientGetFriendsWhoPlayGameResponse" (reportIncompatibleMethodOverride)
-     Parameter 2 name mismatch: base parameter is named "message", override parameter is named "arguments" (reportIncompatibleMethodOverride)
+     Parameter 2 name mismatch: base parameter is named "message", override parameter is named "arguments"
+       "Bot" is incompatible with "TheTestBot" (reportIncompatibleMethodOverride)
+       "ConverterBase[T_co@ConverterBase]" is incompatible with "MediaConverter"

Tanjun (https://github.com/FasterSpeeding/Tanjun)
+       "tanjun.abc.Client" is incompatible with "tanjun.clients.Client"
+       "tanjun.abc.Component" is incompatible with "tanjun.components.Component"

Expression (https://github.com/cognitedata/Expression)
+     "MutableSequence[_T@MutableSequence]" is incompatible with "TypedArray[_TSource@TypedArray]"
+       "MutableSequence[_T@MutableSequence]" is incompatible with "TypedArray[_TSource@TypedArray]"

AutoSplit (https://github.com/Toufool/AutoSplit)
+     "dict[_KT@dict, _VT@dict]" is incompatible with "CaptureMethodDict"
-     Positional parameter count mismatch; base method has 3, but override has 2 (reportIncompatibleMethodOverride)
+     Positional parameter count mismatch; base method has 3, but override has 2
+       "dict[_KT@dict, _VT@dict]" is incompatible with "CaptureMethodDict" (reportIncompatibleMethodOverride)