Restore tests for ByteString in 3.14

[cdce8p]

Ref #2747

The removal of typing.ByteString and collections.abc.ByteString was reverted in Python 3.14.0rc3. They are now scheduled for removal in Python 3.17. Restore the test cases.
https://docs.python.org/3.14/library/typing.html#typing.ByteString

[cdce8p]

Not sure if this should be backported. The original PR was. Though this likely depends on our planned release schedule for astroid and pylint.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.35%. Comparing base (97f4837) to head (e7a9e5b).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2829   +/-   ##
=======================================
  Coverage   93.35%   93.35%           
=======================================
  Files          91       91           
  Lines       11113    11113           
=======================================
  Hits        10375    10375           
  Misses        738      738           

Flag	Coverage Δ
linux	93.22% <ø> (ø)
pypy	93.35% <ø> (ø)
windows	93.34% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
astroid/brain/brain_typing.py	88.95% <ø> (ø)

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[Pierre-Sassoulas]

We're going to release astroid 4.0 soon and afair we released the last 3.x already.

[cdce8p]

We're going to release astroid 4.0 soon and afair we released the last 3.x already.

👍🏻 Let's not backport it then.