Experiment: use upper bound instead of Any for TypeIs[Generic[Any]] in stdlib

[randolf-scholz]

Following the discussion in #16051, if callable should return TypeIs[Callable[..., object]], these methods logically should also use object for their covariant and Never for their contravariant arguments rather than Any.

[github-actions]

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

psycopg (https://github.com/psycopg/psycopg)
+ psycopg_pool/psycopg_pool/_acompat.py:184: error: Incompatible types in assignment (expression has type "object", variable has type "T | Coroutine[Any, Any, T]")  [assignment]
+ psycopg_pool/psycopg_pool/_acompat.py:185: error: Incompatible return value type (got "T | Coroutine[Any, Any, T]", expected "T")  [return-value]

steam.py (https://github.com/Gobot1234/steam.py)
+ steam/utils.py:894: error: Incompatible return value type (got "object", expected "_T")  [return-value]

aiohttp-devtools (https://github.com/aio-libs/aiohttp-devtools)
+ aiohttp_devtools/runserver/config.py:240: error: Incompatible types in assignment (expression has type "object", variable has type "Application | Awaitable[Application]")  [assignment]

prefect (https://github.com/PrefectHQ/prefect)
+ src/prefect/flow_engine.py:1464: error: Incompatible types in assignment (expression has type "object", variable has type "R | type[NotSet]")  [assignment]
+ src/prefect/concurrency/v1/sync.py:63: error: Argument 1 to "emit_concurrency_acquisition_events" has incompatible type "list[MinimalConcurrencyLimitResponse] | Coroutine[Any, Any, list[MinimalConcurrencyLimitResponse]]"; expected "list[MinimalConcurrencyLimitResponse]"  [arg-type]
+ src/prefect/concurrency/v1/sync.py:72: error: Argument 1 to "emit_concurrency_release_events" has incompatible type "list[MinimalConcurrencyLimitResponse] | Coroutine[Any, Any, list[MinimalConcurrencyLimitResponse]]"; expected "list[MinimalConcurrencyLimitResponse]"  [arg-type]
+ src/prefect/cli/deployment.py:215: error: "object" has no attribute "model_dump"  [attr-defined]

strawberry (https://github.com/strawberry-graphql/strawberry)
+ strawberry/utils/await_maybe.py:13: error: Incompatible return value type (got "object", expected "T")  [return-value]

aiohttp (https://github.com/aio-libs/aiohttp)
+ aiohttp/web.py:295:15: error: Incompatible types in assignment (expression has type "object", variable has type "Application | Awaitable[Application]")  [assignment]

scrapy (https://github.com/scrapy/scrapy)
+ scrapy/utils/defer.py:576: error: Incompatible return value type (got "_T | Awaitable[_T]", expected "Awaitable[_T]")  [return-value]

discord.py (https://github.com/Rapptz/discord.py)
+ discord/utils.py:714: error: Incompatible return value type (got "object", expected "T")  [return-value]

trio (https://github.com/python-trio/trio)
+ src/trio/_core/_tests/test_ki.py:687: error: Argument 1 to "send" of "CoroutineType" has incompatible type "None"; expected "Never"  [arg-type]

anyio (https://github.com/agronholm/anyio)
+ src/anyio/from_thread.py:279: error: Argument 1 to "set_result" of "Future" has incompatible type "object"; expected "T_Retval"  [arg-type]

kopf (https://github.com/nolar/kopf)
+ kopf/_core/intents/piggybacking.py:165: error: Incompatible types in assignment (expression has type "object", variable has type "str | None")  [assignment]

paasta (https://github.com/yelp/paasta)
+ paasta_tools/async_utils.py:162: error: "None" has no attribute "close"  [attr-defined]

[srittau]

Cc @AlexWaygood @JelleZijlstra, since you previously commented on this or changed the annotations. I agree that we should at least be consistent inside typeshed.

[JelleZijlstra]

I think I tried this recently and decided to hold off on these?