GH-102456 Fix docstring and getopt options for base64

[ppmfloss]

The -t option for base64 python -m base64 -t is removed in the PR #94230

But some references still exist in the docstring and getopt short options. Because of this we can still run the following command
without getting any error

python -m base64 -t /dev/null

• Issue: Remove docstring and getopt short options for deleted option "python -m base64 -t" #102456

[arhadthedev]

@corona10 as a reviewer of gh-94230 this PR fixes.

[corona10]

lgtm

[miss-islington]

Thanks @ppmfloss for the PR, and @corona10 for merging it 🌮🎉.. I'm working now to backport this PR to: 3.11.
🐍🍒⛏🤖

[miss-islington]

Sorry, @ppmfloss and @corona10, I could not cleanly backport this to 3.11 due to a conflict.
Please backport using cherry_picker on command line.
cherry_picker d828b35785eeb590b8ca92684038f33177989e46 3.11

[bedevere-bot]

⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot s390x Debian 3.x has failed when building commit d828b35.

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/all/#builders/49/builds/4895) and take a look at the build logs.
4. Check if the failure is related to this commit (d828b35) 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/all/#builders/49/builds/4895

Failed tests:

• test_asyncio

Failed subtests:

• test_subprocess_consistent_callbacks - test.test_asyncio.test_subprocess.SubprocessThreadedWatcherTests.test_subprocess_consistent_callbacks
• test_subprocess_consistent_callbacks - test.test_asyncio.test_subprocess.SubprocessPidfdWatcherTests.test_subprocess_consistent_callbacks

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

== Tests result: FAILURE then FAILURE ==

415 tests OK.

10 slowest tests:

• test_tools: 2 min 39 sec
• test_concurrent_futures: 2 min 15 sec
• test_multiprocessing_spawn: 2 min 8 sec
• test_math: 1 min 44 sec
• test_asyncio: 1 min 23 sec
• test_gdb: 1 min 19 sec
• test_multiprocessing_forkserver: 1 min 18 sec
• test_capi: 1 min 17 sec
• test_signal: 1 min 11 sec
• test_multiprocessing_fork: 1 min 11 sec

1 test failed:
test_asyncio

17 tests skipped:
test_dbm_ndbm test_devpoll test_ioctl test_kqueue test_launcher
test_msilib test_peg_generator test_perf_profiler test_startfile
test_tix test_tkinter test_ttk test_winconsoleio test_winreg
test_winsound test_wmi test_zipfile64

1 re-run test:
test_asyncio

Total duration: 7 min 2 sec

Click to see traceback logs

Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Lib/test/test_asyncio/test_subprocess.py", line 770, in test_subprocess_consistent_callbacks
    self.loop.run_until_complete(main())
  File "/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Lib/asyncio/base_events.py", line 664, in run_until_complete
    return future.result()
           ^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Lib/test/test_asyncio/test_subprocess.py", line 762, in main
    self.assertEqual(events, [
AssertionError: Lists differ: [('pi[29 chars]t'), 'pipe_connection_lost', ('pipe_data_recei[57 chars]ted'] != [('pi[29 chars]t'), ('pipe_data_received', 2, b'stderr'), 'pi[57 chars]ted']


Traceback (most recent call last):
  File "/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Lib/test/test_asyncio/test_subprocess.py", line 770, in test_subprocess_consistent_callbacks
    self.loop.run_until_complete(main())
  File "/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Lib/asyncio/base_events.py", line 664, in run_until_complete
    return future.result()
           ^^^^^^^^^^^^^^^
  File "/home/dje/cpython-buildarea/3.x.edelsohn-debian-z/build/Lib/test/test_asyncio/test_subprocess.py", line 762, in main
    self.assertEqual(events, [
AssertionError: Lists differ: [('pi[69 chars]), 'process_exited', 'pipe_connection_lost', '[17 chars]ost'] != [('pi[69 chars]), 'pipe_connection_lost', 'pipe_connection_lo[17 chars]ted']

[arhadthedev]

It seems gh-94230 missed 3.11 and got into 3.12a0. Thus, removing needs backport to 3.11.