Bump relenv to 0.22.23

[dwoz]

Track bumping the pinned relenv version from 0.22.18 to 0.22.23 across all release branches.

Relenv 0.22.23 highlights (vs 0.22.18)

• Fix Verify Builds on Python 3.14 (cffi 2.0.0, swig shim collision) — Release 0.22.19 relenv#316
• Various native-build platform hardening.

Scope

• Bump relenv_version in cicd/shared-gh-workflows-context.yml on 3006.x, 3007.x, 3008.x.
• Regenerate .github/workflows/*.yml via pre-commit.
• Add a changelog entry.