mypy doesn't infer Union inside Tuple in an except clause

[subnix]

Bug Report

If we use Union of exception types inside Tuple as a variable in an except clause, mypy produces a false-positive error.
Relates to #2816

To Reproduce

def handle(err: tuple[type[ValueError] | type[TypeError], ...]):
    try:
        return None
    except err:  # error
        pass

Gist URL: https://gist.github.com/mypy-play/dd08b2806979cb4b7228e7565046f675
Playground URL: https://mypy-play.net/?mypy=latest&python=3.12&flags=strict&gist=dd08b2806979cb4b7228e7565046f675

Expected Behavior
No error.

Actual Behavior

main.py:4: error: Exception type must be derived from BaseException (or be a tuple of exception classes)  [misc]

Your Environment

• Mypy version used: 1.11.2
• Mypy command-line flags: -
• Mypy configuration options from mypy.ini (and other config files): -
• Python version used: 3.12