Revert "Infer correct types with overloads of Type[Guard | Is]

[JukkaL]

This reverts commit 43ea203 (#17678).

The commit caused a regression (#19139). If we can't fix the regression soon enough, reverting the original change temporarily will at least unblock the mypy public release. The reverted PR can be merged again once the regression is fixed.

[JukkaL]

cc @sobolevn

[github-actions]

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

scikit-build-core (https://github.com/scikit-build/scikit-build-core)
- src/scikit_build_core/file_api/reply.py:106: error: "DataclassInstance" not callable  [operator]
- src/scikit_build_core/file_api/reply.py:106: note: Error code "operator" not covered by "type: ignore" comment

discord.py (https://github.com/Rapptz/discord.py)
- discord/ui/select.py:1075: error: Item "function" of "Callable[[V, Interaction[Any], BaseSelectT], CoroutineType[Any, Any, Any]] | Callable[..., CoroutineType[Any, Any, Any]]" has no attribute "__discord_ui_model_type__"  [union-attr]
+ discord/ui/select.py:1075: error: "Callable[[V, Interaction[Any], BaseSelectT], Coroutine[Any, Any, Any]]" has no attribute "__discord_ui_model_type__"  [attr-defined]
- discord/ui/select.py:1076: error: Item "function" of "Callable[[V, Interaction[Any], BaseSelectT], CoroutineType[Any, Any, Any]] | Callable[..., CoroutineType[Any, Any, Any]]" has no attribute "__discord_ui_model_kwargs__"  [union-attr]
+ discord/ui/select.py:1076: error: "Callable[[V, Interaction[Any], BaseSelectT], Coroutine[Any, Any, Any]]" has no attribute "__discord_ui_model_kwargs__"  [attr-defined]
- discord/ui/select.py:1085: error: Item "function" of "Callable[[V, Interaction[Any], BaseSelectT], CoroutineType[Any, Any, Any]] | Callable[..., CoroutineType[Any, Any, Any]]" has no attribute "__discord_ui_model_kwargs__"  [union-attr]
+ discord/ui/select.py:1085: error: "Callable[[V, Interaction[Any], BaseSelectT], Coroutine[Any, Any, Any]]" has no attribute "__discord_ui_model_kwargs__"  [attr-defined]
- discord/ui/select.py:1087: error: Item "function" of "Callable[[V, Interaction[Any], BaseSelectT], CoroutineType[Any, Any, Any]] | Callable[..., CoroutineType[Any, Any, Any]]" has no attribute "__discord_ui_model_kwargs__"  [union-attr]
+ discord/ui/select.py:1087: error: "Callable[[V, Interaction[Any], BaseSelectT], Coroutine[Any, Any, Any]]" has no attribute "__discord_ui_model_kwargs__"  [attr-defined]
- discord/ui/select.py:1103: error: Item "function" of "Callable[[V, Interaction[Any], BaseSelectT], CoroutineType[Any, Any, Any]] | Callable[..., CoroutineType[Any, Any, Any]]" has no attribute "__discord_ui_model_kwargs__"  [union-attr]
+ discord/ui/select.py:1103: error: "Callable[[V, Interaction[Any], BaseSelectT], Coroutine[Any, Any, Any]]" has no attribute "__discord_ui_model_kwargs__"  [attr-defined]
- discord/ext/tasks/__init__.py:631: error: Incompatible return value type (got "Callable[[Any, BaseException], CoroutineType[Any, Any, Any]] | Callable[..., CoroutineType[Any, Any, Any]]", expected "ET")  [return-value]

steam.py (https://github.com/Gobot1234/steam.py)
+ steam/ext/commands/commands.py:331: error: Incompatible types in assignment (expression has type "InvokeT", variable has type "None")  [assignment]
+ steam/ext/commands/commands.py:339: error: Incompatible types in assignment (expression has type "InvokeT", variable has type "None")  [assignment]
- steam/ext/commands/commands.py:324: error: Incompatible return value type (got "Callable[[VarArg(Any), KwArg(Any)], CoroutineType[Any, Any, None]] | Callable[[VarArg(Any), KwArg(Any)], CoroutineType[Any, Any, Any]]", expected "ErrT")  [return-value]
- steam/ext/commands/commands.py:331: error: Incompatible types in assignment (expression has type "Callable[[VarArg(Any), KwArg(Any)], CoroutineType[Any, Any, None]] | Callable[[VarArg(Any), KwArg(Any)], CoroutineType[Any, Any, Any]]", variable has type "None")  [assignment]
- steam/ext/commands/commands.py:332: error: Incompatible return value type (got "Callable[[VarArg(Any), KwArg(Any)], CoroutineType[Any, Any, None]] | Callable[[VarArg(Any), KwArg(Any)], CoroutineType[Any, Any, Any]]", expected "InvokeT")  [return-value]
- steam/ext/commands/commands.py:339: error: Incompatible types in assignment (expression has type "Callable[[VarArg(Any), KwArg(Any)], CoroutineType[Any, Any, None]] | Callable[[VarArg(Any), KwArg(Any)], CoroutineType[Any, Any, Any]]", variable has type "None")  [assignment]
- steam/ext/commands/commands.py:340: error: Incompatible return value type (got "Callable[[VarArg(Any), KwArg(Any)], CoroutineType[Any, Any, None]] | Callable[[VarArg(Any), KwArg(Any)], CoroutineType[Any, Any, Any]]", expected "InvokeT")  [return-value]
- steam/ext/commands/help.py:138: note:          Callable[[VarArg(Any), KwArg(Any)], CoroutineType[Any, Any, None]] | Callable[[VarArg(Any), KwArg(Any)], CoroutineType[Any, Any, Any]]
+ steam/ext/commands/help.py:138: note:          ErrT
- steam/ext/commands/cog.py:180: error: Incompatible return value type (got "Callable[[Any | None, VarArg(Any), KwArg(Any)], CoroutineType[Any, Any, None]] | Callable[[Any | None, VarArg(Any), KwArg(Any)], CoroutineType[Any, Any, Any]] | Callable[..., CoroutineType[Any, Any, Any]]", expected "F")  [return-value]
+ steam/ext/commands/bot.py:467: error: Incompatible types in assignment (expression has type "BotInvokeT", variable has type "None")  [assignment]
+ steam/ext/commands/bot.py:475: error: Incompatible types in assignment (expression has type "BotInvokeT", variable has type "None")  [assignment]
- steam/ext/commands/bot.py:467: error: Incompatible types in assignment (expression has type "Callable[[Context[Any]], CoroutineType[Any, Any, None]] | Callable[[Context[Any]], CoroutineType[Any, Any, Any]] | Callable[..., CoroutineType[Any, Any, Any]]", variable has type "None")  [assignment]
- steam/ext/commands/bot.py:468: error: Incompatible return value type (got "Callable[[Context[Any]], CoroutineType[Any, Any, None]] | Callable[[Context[Any]], CoroutineType[Any, Any, Any]] | Callable[..., CoroutineType[Any, Any, Any]]", expected "BotInvokeT")  [return-value]
- steam/ext/commands/bot.py:475: error: Incompatible types in assignment (expression has type "Callable[[Context[Any]], CoroutineType[Any, Any, None]] | Callable[[Context[Any]], CoroutineType[Any, Any, Any]] | Callable[..., CoroutineType[Any, Any, Any]]", variable has type "None")  [assignment]
- steam/ext/commands/bot.py:476: error: Incompatible return value type (got "Callable[[Context[Any]], CoroutineType[Any, Any, None]] | Callable[[Context[Any]], CoroutineType[Any, Any, Any]] | Callable[..., CoroutineType[Any, Any, Any]]", expected "BotInvokeT")  [return-value]

[sobolevn]

Thank you!