Restrict supported service types of Karamda APIServer supported by karmada-operator

[RainbowMango]

What type of PR is this?

/kind cleanup
/kind api-change

What this PR does / why we need it:
This PR restrics the service types supported by karmada-operator.

Which issue(s) this PR fixes:
Part of #5767

Special notes for your reviewer:
This PR introduces validation rules which narrow down the range of acceptable configuration, but this has no impact on users who are currently using ClusterIP and NodePort. And for Loadbalancer and ExternalName, currently not supported. (We are considering introduce the support of Loadbalancer to address the use case reported at #4634).

Does this PR introduce a user-facing change?:

The ServiceType of the Karmada API server in `Karmada` API now has been restricted to `ClusterIP`, `NodePort`, and `LoadBalancer`.

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 42.32%. Comparing base (057cf86) to head (a644477).

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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5769      +/-   ##
==========================================
+ Coverage   42.31%   42.32%   +0.01%     
==========================================
  Files         655      655              
  Lines       55756    55756              
==========================================
+ Hits        23591    23598       +7     
+ Misses      30651    30646       -5     
+ Partials     1514     1512       -2     

Flag	Coverage Δ
unittests	42.32% <ø> (+0.01%)	⬆️

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[RainbowMango]

cc @chaosi-zju @jabellard @calvin0327

[chaosi-zju]

/lgtm

[karmada-bot]

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