gh-144005: Eliminate redundant refcounting in the JIT for BINARY_OP_EXTEND

[aisk]

• Issue: Eliminate redundant refcounting in the JIT for BINARY_OP_EXTEND #144005

[Fidget-Spinner]

Thanks, please fix the merge conflicts (pull main and regen cases). Thank you!

[savannahostrowski]

Looks great! Thank you!

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot AMD64 Alpine Linux 3.x (no tier) has failed when building commit 2f42f83.

What do you need to do:

1. Don't panic.
2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
3. Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/301/builds/14053) and take a look at the build logs.
4. Check if the failure is related to this commit (2f42f83) or if it is a false positive.
5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/#/builders/301/builds/14053

Summary of the results of the build (if available):

==

Click to see traceback logs

Traceback (most recent call last):
  File �[35m"/buildbot/buildarea/3.x.ware-alpine/build/Lib/tempfile.py"�[0m, line �[35m484�[0m, in �[35m__del__�[0m
    �[31m_warnings.warn�[0m�[1;31m(self.warn_message, ResourceWarning)�[0m
    �[31m~~~~~~~~~~~~~~�[0m�[1;31m^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^�[0m
�[1;35mResourceWarning�[0m: �[35mImplicitly cleaning up <HTTPError 403: 'Forbidden'>�[0m

[savannahostrowski]

Buildbot failure looks unrelated