Optimize wasmplugin proto

[johnlanni]

Ⅰ. Describe what this PR did

Ⅱ. Does this pull request fix one issue?

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.

Project coverage is 43.63%. Comparing base (ef31e09) to head (b4260b3).
Report is 257 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/ingress/config/ingress_config.go	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1656      +/-   ##
==========================================
+ Coverage   35.91%   43.63%   +7.72%     
==========================================
  Files          69       76       +7     
  Lines       11576    12358     +782     
==========================================
+ Hits         4157     5393    +1236     
+ Misses       7104     6628     -476     
- Partials      315      337      +22     

Files with missing lines	Coverage Δ
pkg/ingress/config/ingress_config.go	12.92% <0.00%> (-0.95%)	⬇️

... and 69 files with indirect coverage changes

[CH3CHO]

LGTM