gh-127945: move initialization of field desc to module exec in ctypes

[kumaraditya303]

• Issue: ctypes thread safety auditing (and fixing) #127945

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot ARM64 macOS 3.x (tier-2) has failed when building commit 2ff5eb8.

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/725/builds/10460) and take a look at the build logs.
4. Check if the failure is related to this commit (2ff5eb8) 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/725/builds/10460

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

Click to see traceback logs

remote: Enumerating objects: 7, done.        
remote: Counting objects:  14% (1/7)        
remote: Counting objects:  28% (2/7)        
remote: Counting objects:  42% (3/7)        
remote: Counting objects:  57% (4/7)        
remote: Counting objects:  71% (5/7)        
remote: Counting objects:  85% (6/7)        
remote: Counting objects: 100% (7/7)        
remote: Counting objects: 100% (7/7), done.        
remote: Compressing objects:  33% (1/3)        
remote: Compressing objects:  66% (2/3)        
remote: Compressing objects: 100% (3/3)        
remote: Compressing objects: 100% (3/3), done.        
remote: Total 7 (delta 4), reused 4 (delta 4), pack-reused 0 (from 0)        
From https://github.com/python/cpython
 * branch                    main       -> FETCH_HEAD
Note: switching to '2ff5eb8582939eb9182d3449d08542881caf3e0d'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
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If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -c with the switch command. Example:

  git switch -c <new-branch-name>

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Turn off this advice by setting config variable advice.detachedHead to false

HEAD is now at 2ff5eb85829 gh-127945: move initialization of field desc to module exec in ctypes  (#132552)
Switched to and reset branch 'main'

fatal error: /Library/Developer/CommandLineTools/usr/bin/ranlib: can't write to output file (No space left on device)
/Library/Developer/CommandLineTools/usr/bin/ar: internal ranlib command failed
make: *** [libpython3.14d.a] Error 1