Prepare 2.18.0.dev2 release

[Eric-Arellano]

No description provided.

[Eric-Arellano]

Internal:

• Add some module mappings (#19327)

• Remove dependency on importlib_resources (#19339)

• A couple of fixes to cherry-picking and make_pr.sh (#19322)

• Pin test_package_pex_environment's image to a particular sha (#19324)

• Prepare the 2.15.2 release. (#19317)

• Prepare the 2.16.0 release. (#19316)

• Fix auto-cherry-pick issues discovered when run (#19312)

• A few fixes for the auto-cherry-pick script (#19307)

• Write directly to relevant notes file in changelog.py (#19303)

• Move more release code to src/python/pants_release. (#19300)

• Modernize the Cherry-Picker script (#19230)

• Create a top-level pants_release package. (#19297)

• Prepare the 2.16.0rc7 release. (#19292)

• remove the custom check for "./pants" in code. (#19295)

• Add act to Pants (all in BUILD) and smoke test our workflows (#19278)

• Don't gpg-sign PyPI uploads in our release process. (#19287)

• Fix S3 URL Handler for good (#19285)

• Apply taplo to the repository (#18998)

• Prepare the 2.17.0rc1 release. (#19276)

• Prepare the 2.15.2rc0 release. (#19275)

• Prepare the 2.16.0rc6 release. (#19274)

• Save CI test reports to S3. (#19262)

• Break a generic copy function out of deploy_to_s3. (#19251)

• Add cherry-pick PRs to their milestone for better visibility (#19254)

• Delete dead code from old Python Tool Export (#19252)