Gateway API: Sort header filters to avoid canary restarts

[mingjie-li]

fix canary analysis restart with gateway api

Fix: #1712

[aryan9600]

thanks for opening this PR!

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 76.00000% with 6 lines in your changes missing coverage. Please review.

Project coverage is 35.06%. Comparing base (2d5e289) to head (b88e080).
Report is 20 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/router/gateway_api.go	76.92%	2 Missing and 1 partial ⚠️
pkg/router/gateway_api_v1beta1.go	75.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1713      +/-   ##
==========================================
+ Coverage   34.44%   35.06%   +0.61%     
==========================================
  Files         283      283              
  Lines       20691    24645    +3954     
==========================================
+ Hits         7128     8642    +1514     
- Misses      12627    15063    +2436     
- Partials      936      940       +4     

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[stefanprodan]

LGTM

Thanks @mingjie-li 🥇

[aryan9600]

lgtm!