fix: remove header & mirror routes so rollout can complete. Fixes #2526

[chansuke]

Fixes #2526

Checklist:

• Either (a) I've created an enhancement proposal and discussed it with the community, (b) this is a bug fix, or (c) this is a chore.
• The title of the PR is (a) conventional with a list of types and scopes found here, (b) states what changed, and (c) suffixes the related issues number. E.g. "fix(controller): Updates such and such. Fixes #1234".
• I've signed my commits with DCO
• I have written unit and/or e2e tests for my change. PRs without these are unlikely to be merged.
• My builds are green. Try syncing with master if they are not.
• My organization is added to USERS.md.

[github-actions]

Published E2E Test Results

  4 files    4 suites   3h 54m 17s ⏱️
120 tests 103 ✅  7 💤 10 ❌
492 runs  453 ✅ 28 💤 11 ❌

For more details on these failures, see this check.

Results for commit bd8a772.

♻️ This comment has been updated with latest results.

[github-actions]

Published Unit Test Results

2 456 tests   2 456 ✅  3m 20s ⏱️
  129 suites      0 💤
    1 files        0 ❌

Results for commit bd8a772.

♻️ This comment has been updated with latest results.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[brianpham]

@zachaller Hello! I wanted to follow up to see if this is still planning to be merged.

[brianpham]

@Hariharasuthan99 Are you able to help to see if we can merge this PR?

[Hariharasuthan99]

@chansuke , can you close&reopen or rebase the PR to make builds run again?

[chansuke]

@Hariharasuthan99
ok!

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

❌ Patch coverage is 58.00000% with 21 lines in your changes missing coverage. Please review.
✅ Project coverage is 84.90%. Comparing base (c40cb0d) to head (bd8a772).

Files with missing lines	Patch %	Lines
rollout/trafficrouting/istio/istio.go	58.00%	10 Missing and 11 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4307      +/-   ##
==========================================
- Coverage   84.92%   84.90%   -0.03%     
==========================================
  Files         164      164              
  Lines       18966    18994      +28     
==========================================
+ Hits        16107    16126      +19     
- Misses       2002     2006       +4     
- Partials      857      862       +5     

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[Hariharasuthan99]

@chansuke could you add/update test cases to increase coverage ?