[release/v1.6] cherry pick for v1.6.7

[rudrakhp]

https://github.com/envoyproxy/gateway/pulls?q=is%3Apr+label%3Acherrypick%2Frelease-v1.6.7+

[codecov]

Codecov Report

❌ Patch coverage is 95.98854% with 14 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.29%. Comparing base (9a123d5) to head (5bf1a0e).
⚠️ Report is 1 commits behind head on release/v1.6.

Files with missing lines	Patch %	Lines
internal/gatewayapi/backendtrafficpolicy.go	90.90%	0 Missing and 4 partials ⚠️
internal/gatewayapi/contexts.go	96.59%	2 Missing and 1 partial ⚠️
internal/gatewayapi/backendtlspolicy.go	89.47%	0 Missing and 2 partials ⚠️
internal/gatewayapi/extensionserverpolicy.go	87.50%	1 Missing and 1 partial ⚠️
internal/gatewayapi/envoyextensionpolicy.go	95.65%	0 Missing and 1 partial ⚠️
internal/gatewayapi/route.go	98.57%	1 Missing ⚠️
internal/gatewayapi/securitypolicy.go	96.66%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@               Coverage Diff                @@
##           release/v1.6    #8840      +/-   ##
================================================
+ Coverage         73.20%   73.29%   +0.08%     
================================================
  Files               231      231              
  Lines             34699    34872     +173     
================================================
+ Hits              25401    25558     +157     
- Misses             7460     7474      +14     
- Partials           1838     1840       +2     

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