Fix no-member in type annotations with future import

[cdce8p]

Description

Don't emit no-member inside type annotations with from __future__ import annotations.

With PEP 563, annotations are stored as strings and thus not executed. This can cause false-positives if attributes are used which don't exist in the version used to run pylint.

# pylint: disable=missing-docstring,unused-argument
from __future__ import annotations

import ast
import sys

if sys.version_info >= (3, 10):
    def func(node: ast.Match) -> None:  # no-member
        ...

If Python 3.8 is used, pylint would currently emit a no-member error for ast.Match (which was added in 3.10).
By excluding type annotations with from __future__ import annotations, the behavior will be similar to normal string annotations (which don't emit an error).

def func(node: "ast.Match") -> None:
    ...

Closes #6594

[coveralls]

Pull Request Test Coverage Report for Build 2320780359

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.0006%) to 95.347%

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Totals
Change from base Build 2320650537:	0.0006%
Covered Lines:	16045
Relevant Lines:	16828

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💛 - Coveralls

[Pierre-Sassoulas]

LGTM