cherry-pick #6977 to 1.62.x release branch

[dfawley]

No description provided.

[codecov]

Codecov Report

Merging #6979 (a046599) into v1.62.x (d41b01d) will decrease coverage by 0.26%.
The diff coverage is 100.00%.

Additional details and impacted files

@@             Coverage Diff             @@
##           v1.62.x    #6979      +/-   ##
===========================================
- Coverage    82.62%   82.36%   -0.26%     
===========================================
  Files          296      296              
  Lines        31432    31450      +18     
===========================================
- Hits         25970    25905      -65     
- Misses        4422     4482      +60     
- Partials      1040     1063      +23     

Files	Coverage Δ
internal/transport/controlbuf.go	89.34% <ø> (-0.02%)	⬇️
internal/transport/http2_client.go	90.64% <100.00%> (-0.28%)	⬇️
internal/transport/http2_server.go	89.70% <100.00%> (-1.01%)	⬇️

... and 19 files with indirect coverage changes