feat: support inverting header matches for rate limit

[rudrakhp]

What type of PR is this?

Feature changes for supporting inverting header matches for rate limiting.

What this PR does / why we need it:

Implements API changes proposed in #4176

Which issue(s) this PR fixes:

Ref #2193

[codecov]

Codecov Report

Attention: Patch coverage is 82.35294% with 3 lines in your changes missing coverage. Please review.

Project coverage is 65.72%. Comparing base (d1cc0ba) to head (5c645de).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/xds/translator/local_ratelimit.go	50.00%	1 Missing and 1 partial ⚠️
internal/gatewayapi/backendtrafficpolicy.go	85.71%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4286   +/-   ##
=======================================
  Coverage   65.71%   65.72%           
=======================================
  Files         200      200           
  Lines       24128    24141   +13     
=======================================
+ Hits        15856    15866   +10     
- Misses       7138     7139    +1     
- Partials     1134     1136    +2     

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[arkodg]

the PR looks good, can you add some tests in https://github.com/envoyproxy/gateway/tree/main/internal/gatewayapi/testdata & https://github.com/envoyproxy/gateway/tree/main/internal/xds/translator/testdata

[arkodg]

LGTM thanks !

would be great to see some e2e and docs in follow up PRs

[zirain]

can you make linter happy?

[arkodg]

can you make linter happy?

here are the errors

internal/xds/translator/testdata/in/xds-ir/ratelimit.yaml
  Error: 74:13 [indentation] wrong indentation: expected 10 but found 12
  Error: 75:17 [indentation] wrong indentation: expected 14 but found 16
  Error: 86:9 [indentation] wrong indentation: expected 6 but found 8
  Error: 87:13 [indentation] wrong indentation: expected 10 but found 12
  Error: 88:26 [new-line-at-end-of-file] no new line character at the end of file

[rudrakhp]

@arkodg @zirain done!