gh-136437: Make several functions in os.path pos-only

[sobolevn]

Marking functions from #136812 and #136946 as accepting pos-only.

Not to be backported.

• Issue: Different parameter names in os.path documentation vs. runtime #136437

[serhiy-storchaka]

Should not it update also samestat, samefile, maybe other functions in genericpath?

[sobolevn]

Yes, I missed samestat and probably several others when created first PR. Because they have (s1, s2) which escaped my regex. We first need to document them as pos-only. Thanks for the good catch!

[sobolevn]

I created #136970 to fix first

[AA-Turner]

I created #136970 to fix first

Merged.

A

[serhiy-storchaka]

LGTM.

[sobolevn]

Thanks everyone! Will leave open till tomorrow and merge :)