chore: delete default svc template in webhook

[Rory-Z]

No description provided.

[codecov]

Codecov Report

Patch coverage: 61.78% and project coverage change: -0.46% ⚠️

Comparison is base (caaf5bc) 78.01% compared to head (5b8e0a1) 77.56%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #923      +/-   ##
==========================================
- Coverage   78.01%   77.56%   -0.46%     
==========================================
  Files          67       67              
  Lines        5991     6035      +44     
==========================================
+ Hits         4674     4681       +7     
- Misses       1097     1131      +34     
- Partials      220      223       +3     

Files Changed	Coverage Δ
apis/apps/v2beta1/emqx_webhook.go	96.49% <ø> (-0.64%)	⬇️
controllers/apps/v2beta1/add_svc.go	77.20% <58.20%> (-10.17%)	⬇️
controllers/apps/v2beta1/add_emqx_core.go	90.50% <63.63%> (-2.73%)	⬇️
controllers/apps/v2beta1/add_emqx_repl.go	89.74% <63.63%> (-2.93%)	⬇️
controllers/apps/v2beta1/emqx_controller.go	88.37% <100.00%> (ø)

... and 3 files with indirect coverage changes

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