Remove awscli packaging extra

[jakob-keller]

Description of Change

Remove the awscli packaging extra.

Assumptions

The discussion around #1424 has not yielded substantial concerns with regards to removing the awscli packaging extra. This PR makes the proposed change concrete and may act as another opportunity for critical discussion or feedback.

Checklist for All Submissions

• I have added change info to CHANGES.rst
• If this is resolving an issue (needed so future developers can determine if change is still necessary and under what conditions) (can be provided via link to issue with these details): partially addresses Remove awscli and boto3 optional dependencies #1424
  • Detailed description of issue
  • Alternative methods considered (if any)
  • How issue is being resolved
  • How issue can be reproduced
• If this is providing a new feature (can be provided via link to issue with these details):
  • Detailed description of new feature
  • Why needed
  • Alternatives methods considered (if any)

Checklist when updating botocore and/or aiohttp versions

• I have read and followed CONTRIBUTING.rst
• I have updated test_patches.py where/if appropriate (also check if no changes necessary)
• I have ensured that the awscli/boto3 versions match the updated botocore version
• I have added URL to diff: boto/botocore@[CURRENT_BOTO_VERSION_TAG]...[NEW_BOTO_VERSION_TAG]

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.60%. Comparing base (1609736) to head (79c7a9c).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1435      +/-   ##
==========================================
- Coverage   91.70%   91.60%   -0.11%     
==========================================
  Files          76       76              
  Lines        8078     8075       -3     
==========================================
- Hits         7408     7397      -11     
- Misses        670      678       +8     

Flag	Coverage Δ
no-httpx	88.47% <100.00%> (-0.05%)	⬇️
os-ubuntu-24.04	91.60% <100.00%> (-0.11%)	⬇️
os-ubuntu-24.04-arm	89.60% <100.00%> (-0.11%)	⬇️
python-3.10	89.57% <100.00%> (-0.11%)	⬇️
python-3.11	89.57% <100.00%> (-0.11%)	⬇️
python-3.12	89.57% <100.00%> (-0.11%)	⬇️
python-3.13	89.57% <100.00%> (-0.11%)	⬇️
python-3.14	91.57% <100.00%> (-0.11%)	⬇️
python-3.9	89.59% <100.00%> (-0.11%)	⬇️
unittests	91.60% <100.00%> (-0.11%)	⬇️
with-awscrt	91.24% <100.00%> (-0.05%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[jakob-keller]

Reviewers: I intend to keep this PR open for a week or so to give everyone the opportunity to chime in.