[chore] Prepare release v1.45.0/v0.139.0

[otelbot]

The following commands were run to prepare this release:

• make chlog-update VERSION=v1.45.0/v0.139.0
• make prepare-release PREVIOUS_VERSION=1[.]44[.]0 RELEASE_CANDIDATE=1.45.0 MODSET=stable
• make prepare-release PREVIOUS_VERSION=0[.]138[.]0 RELEASE_CANDIDATE=0.139.0 MODSET=beta

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.26%. Comparing base (82f2534) to head (adf4e7c).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #14117      +/-   ##
==========================================
- Coverage   92.27%   92.26%   -0.02%     
==========================================
  Files         657      657              
  Lines       41111    41111              
==========================================
- Hits        37936    37930       -6     
- Misses       2173     2177       +4     
- Partials     1002     1004       +2     

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