Always use Literal from typing_extensions

[Taragolis]

During the removing support of Python 3.7 #30963, we incidentally create this block

# Literal in 3.8 is limited to one single argument, not e.g. "Literal[1, 2]".
if sys.version_info >= (3, 9):
    from typing import Literal
else:
    from typing import Literal

This PR fix by use everywhere from typing_extension import Literal instead of

• from typing import Literal
• from airflow.typing_compat import Literal

In additional Literal has other known bugs which finally resolved in Python 3.10.1+, so personally I thought that better just use from typing_extension import Literal rather than out airflow.typing_compat resolver

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[Taragolis]

TypeGuard also presented in our airflow.typing_compat so we might want to use two imports here:

from typing_extensions import Literal

from airflow.typing_compat import TypeGuard

[potiuk]

Yes.

[Taragolis]

I hope I've finally finish rebasing and resolve conflicts 🤣

[hussein-awala]

I hope I've finally finish rebasing and resolve conflicts 🤣

I will wait your PR before merging the other PRs

[Taragolis]

No problem, that was just funny.
Anyway someone should resolve conflict - I in one PR or you in multiple

[hussein-awala]

Flaky test, you can merge it if there is nothing to change.

[uranusjr]

Why is typing_extension used unconditionally instead of only for 3.10.1+ (or more conveniently just 3.11+)?

[Taragolis]

Why is typing_extension used unconditionally instead of only for 3.10.1+ (or more conveniently just 3.11+)?

For provider just for do not write something this condition everywhere, seem like we save to use until we can get rid of it.

For core, maybe here we should use such condition, and I was merge before got additional review comments 😞

[uranusjr]

Should I do that? (Asking in case you’re already doing it)

[Taragolis]

I could do that.