feat: add annotation for mirror svc

[robynron]

Ⅰ. Describe what this PR did

add new ingress annotation feature.
higress.io/mirror-target-service: Route traffic that meets all routing rules under the ingress to the specified service.
higress.io/mirror-percentage: Route traffic that meets all routing rules under the ingress to the specified services by percentage.

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

[SpecialYang]

看看加下e2e test

[Xunzhuo]

A question for this feature, how do we specify the mirror filter to a specific rule? Or does it mean all rules backend will have a same mirror svc?

[johnlanni]

@robynron 解决一下冲突吧

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 30.55556% with 50 lines in your changes missing coverage. Please review.

Project coverage is 44.12%. Comparing base (ef31e09) to head (4f78b91).
Report is 100 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/ingress/kube/annotations/mirror.go	45.83%	18 Missing and 8 partials ⚠️
pkg/ingress/kube/util/util.go	0.00%	22 Missing ⚠️
pkg/ingress/kube/annotations/annotations.go	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1121      +/-   ##
==========================================
+ Coverage   35.91%   44.12%   +8.21%     
==========================================
  Files          69       76       +7     
  Lines       11576     9895    -1681     
==========================================
+ Hits         4157     4366     +209     
+ Misses       7104     5192    -1912     
- Partials      315      337      +22     

Files with missing lines	Coverage Δ
pkg/ingress/kube/annotations/annotations.go	28.40% <0.00%> (-3.23%)	⬇️
pkg/ingress/kube/util/util.go	43.33% <0.00%> (-38.72%)	⬇️
pkg/ingress/kube/annotations/mirror.go	45.83% <45.83%> (ø)

... and 88 files with indirect coverage changes

[robynron]

A question for this feature, how do we specify the mirror filter to a specific rule? Or does it mean all rules backend will have a same mirror svc?

mirror all rules under an ingress to new services by percentage.