feat: combine xds-translator and xds-server runners

[arkodg]

• The combined runner is called xds
• This should eliminate one layer of caching resulting in mem savings

Fixes: https://github.com/envoyproxy/gateway/issues/3980

[arkodg]

this is a breaking change

• the log components - xdc-translator and xds-server have been removed and a new log component xds has been added
• this also affects change in control plane metrics labels

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 54 lines in your changes missing coverage. Please review.

Project coverage is 65.55%. Comparing base (bd966b8) to head (bb3137a). Report is 103 commits behind head on main.

Files with missing lines	Patch %	Lines
internal/xds/runner/runner.go	0.00%	52 Missing :warning:
internal/cmd/server.go	0.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #4326 +/- ## ========================================== - Coverage 65.74% 65.55% -0.19% ========================================== Files 197 196 -1 Lines 23767 23719 -48 ========================================== - Hits 15626 15550 -76 - Misses 7020 7059 +39 + Partials 1121 1110 -11 ```

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[arkodg]

looks like the mem usage increased, that looks odd cc @shawnh2