Vmcp: Migrate telemetry config

[jerm-dro]

Summary

Stacked on #3205
Supports #3125

This PR migrates the telemetry config to use the app config's telemetry config.

Changes

1. Delete the legacy telemetry config field on the spec.
2. Preserve the existing application of defaults and normalization of config by converting back into the legacy type. This code is more involved to refactor, so I'm leaving it in place until the refactor is complete.
3. Update docs and examples.

[codecov]

Codecov Report

❌ Patch coverage is 24.24242% with 25 lines in your changes missing coverage. Please review.
✅ Project coverage is 57.02%. Comparing base (8e8af3b) to head (179cae2).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
cmd/thv-operator/pkg/vmcpconfig/converter.go	24.24%	25 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3207      +/-   ##
==========================================
- Coverage   57.06%   57.02%   -0.05%     
==========================================
  Files         350      350              
  Lines       34744    34776      +32     
==========================================
+ Hits        19826    19830       +4     
- Misses      13269    13298      +29     
+ Partials     1649     1648       -1     

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The base branch was changed.