Remove deprecated `re.template`, `re.T`, `re.TEMPLATE`

[sobolevn]

Feature or enhancement

It is time to remove deprecated stuff from re module.
The 3.11 says:

The :func:re.template function and the corresponding :const:re.TEMPLATE
and :const:re.T flags are deprecated, as they were undocumented and
lacked an obvious purpose. They will be removed in Python 3.13.

Pitch

I think that now there are no things that stop us from doing so, all issues were settled in #92728

Previous discussion

Previous discussion: #92728
Initial removal: b09184b
Revert of the removal + deprecation: 16a7e4a

PR is on its way.

Linked PRs

• gh-105687: Remove deprecated objects from re module #105688