feat: support rewrite annotation

[lingsamuel]

Signed-off-by: Ling Samuel lingsamuelgrace@gmail.com

Please answer these questions before submitting a pull request

• Why submit this pull request?

• Bugfix

• New feature provided

• Improve performance

• Backport patches

• Related issues

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New feature or improvement

• Describe the details and related test reports.

Support rewrite request by annotation.

Note: because regex may contains comma, the regex require two annotations.

[codecov-commenter]

Codecov Report

Merging #480 (b64bce7) into master (0bdd24b) will decrease coverage by 0.18%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #480      +/-   ##
==========================================
- Coverage   37.04%   36.86%   -0.19%     
==========================================
  Files          47       48       +1     
  Lines        3841     3860      +19     
==========================================
  Hits         1423     1423              
- Misses       2233     2252      +19     
  Partials      185      185              

Impacted Files	Coverage Δ
pkg/kube/translation/annotations.go	36.36% <ø> (ø)
pkg/kube/translation/annotations/rewrite.go	0.00% <0.00%> (ø)
pkg/apisix/cluster.go	26.69% <0.00%> (-0.35%)	⬇️
pkg/ingress/controller.go	0.00% <0.00%> (ø)

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[tokers]

@lingsamuel All files should carry the Apache License Header.