feat: protoc-gen-go-xfieldmask

[B15030328]

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[codecov-commenter]

Codecov Report

Merging #755 (427d3f2) into master (49d894f) will decrease coverage by 2.80%.
The diff coverage is 13.63%.

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@@            Coverage Diff             @@
##           master     #755      +/-   ##
==========================================
- Coverage   53.30%   50.50%   -2.80%     
==========================================
  Files         199      146      -53     
  Lines       10917     9338    -1579     
==========================================
- Hits         5819     4716    -1103     
+ Misses       4657     4226     -431     
+ Partials      441      396      -45     

Impacted Files	Coverage Δ
proto/helloworld/v1/helloworld.pb.gw.go	0.00% <0.00%> (-13.46%)	⬇️
proto/helloworld/v1/helloworld_echo.pb.go	58.82% <ø> (ø)
proto/helloworld/v1/helloworld_gin.pb.go	50.00% <ø> (ø)
proto/helloworld/v1/helloworld.pb.go	17.66% <14.28%> (-2.34%)	⬇️
proto/helloworld/v1/helloworld_impl.go	47.36% <100.00%> (ø)

... and 83 files with indirect coverage changes

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