cherry-pick #6977 to 1.61.x release branch

[dfawley]

No description provided.

[codecov]

Codecov Report

Merging #6980 (467a4ed) into v1.61.x (52e2363) will decrease coverage by 1.37%.
Report is 2 commits behind head on v1.61.x.
The diff coverage is 100.00%.

Additional details and impacted files

@@             Coverage Diff             @@
##           v1.61.x    #6980      +/-   ##
===========================================
- Coverage    83.84%   82.48%   -1.37%     
===========================================
  Files          287      295       +8     
  Lines        30930    31453     +523     
===========================================
+ Hits         25933    25943      +10     
- Misses        3947     4452     +505     
- Partials      1050     1058       +8     

Files	Coverage Δ
internal/transport/controlbuf.go	89.00% <ø> (-0.87%)	⬇️
internal/transport/http2_client.go	90.95% <100.00%> (-0.05%)	⬇️
internal/transport/http2_server.go	89.45% <100.00%> (-0.43%)	⬇️

... and 26 files with indirect coverage changes