fix: get new httpRoutesI after removeRoute() to avoid duplicates. Fixes #2769

[xinpureZhu]

fixes: #2769
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]

Go Published Test Results

1 991 tests   1 991 ✔️  2m 37s ⏱️
   118 suites         0 💤
       1 files           0 ❌

Results for commit 957060c.

♻️ This comment has been updated with latest results.

[github-actions]

E2E Tests Published Test Results

    4 files      4 suites   3h 25m 15s ⏱️
  97 tests   84 ✔️   5 💤   8 ❌
402 runs  369 ✔️ 20 💤 13 ❌

For more details on these failures, see this check.

Results for commit 957060c.

♻️ This comment has been updated with latest results.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[codecov]

Codecov Report

Patch coverage: 25.00% and project coverage change: -0.01 ⚠️

Comparison is base (c8cd968) 81.67% compared to head (957060c) 81.67%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2887      +/-   ##
==========================================
- Coverage   81.67%   81.67%   -0.01%     
==========================================
  Files         133      133              
  Lines       20193    20192       -1     
==========================================
- Hits        16493    16492       -1     
  Misses       2847     2847              
  Partials      853      853              

Impacted Files	Coverage Δ
rollout/trafficrouting/istio/istio.go	75.78% <25.00%> (-0.03%)	⬇️

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