webhook: migrate to url endpoint

[l1b0k]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 60.90226% with 52 lines in your changes missing coverage. Please review.

Project coverage is 22.36%. Comparing base (1c70388) to head (d248a61).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/cert/webhook.go	61.36%	42 Missing and 9 partials ⚠️
cmd/terway-controlplane/terway-controlplane.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #745      +/-   ##
==========================================
+ Coverage   21.50%   22.36%   +0.86%     
==========================================
  Files         121      121              
  Lines       15915    15964      +49     
==========================================
+ Hits         3422     3571     +149     
+ Misses      12110    11993     -117     
- Partials      383      400      +17     

Flag	Coverage Δ
unittests	22.36% <60.90%> (+0.86%)	⬆️

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