chore: deprecate --konnect-runtime-group-id flag

[czeslavo]

What this PR does / why we need it:

Deprecates --konnect-runtime-group-id CLI flag, introduces --konnect-control-plane-id instead.

Which issue this PR fixes:

Part of #4466.

PR Readiness Checklist:

Complete these before marking the PR as ready to review:

• the CHANGELOG.md release notes have been updated to reflect any significant (and particularly user-facing) changes introduced by this PR

[team-k8s-bot]

E2E (targeted) tests with KIND-based clusters were started at https://github.com/Kong/kubernetes-ingress-controller/actions/runs/6456059397

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (6a951b1) 77.6% compared to head (8112150) 77.6%.
Report is 2 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #4783   +/-   ##
=====================================
  Coverage   77.6%   77.6%           
=====================================
  Files        163     163           
  Lines      18520   18523    +3     
=====================================
+ Hits       14381   14389    +8     
+ Misses      3326    3322    -4     
+ Partials     813     812    -1     

Files	Coverage Δ
internal/konnect/license/client.go	82.9% <100.0%> (ø)
internal/manager/config.go	94.7% <100.0%> (+<0.1%)	⬆️
internal/manager/config_validation.go	83.1% <100.0%> (ø)
internal/konnect/nodes/client.go	0.0% <0.0%> (ø)
internal/adminapi/konnect.go	0.0% <0.0%> (ø)

... and 6 files with indirect coverage changes

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[team-k8s-bot]

E2E (targeted) tests with KIND-based clusters were started at https://github.com/Kong/kubernetes-ingress-controller/actions/runs/6458313363