feat(telemetry): include gw discovery and konnect sync in reports

[czeslavo]

What this PR does / why we need it:

Adds feature-konnecy-sync={false,true}, feature-gateway-service-discovery={false, true} report values. Also removes unused code.

Which issue this PR fixes:

Closes #3460 and #3362.

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

[codecov]

Codecov Report

Base: 72.0% // Head: 71.9% // Decreases project coverage by -0.1% ⚠️

Coverage data is based on head (48783e2) compared to base (abdde8e).
Patch coverage: 37.5% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #3588     +/-   ##
=======================================
- Coverage   72.0%   71.9%   -0.1%     
=======================================
  Files        130     130             
  Lines      15426   15438     +12     
=======================================
+ Hits       11109   11110      +1     
- Misses      3604    3612      +8     
- Partials     713     716      +3     

Impacted Files	Coverage Δ
internal/manager/run.go	40.2% <0.0%> (-0.7%)	⬇️
internal/manager/telemetry/reports.go	0.0% <0.0%> (ø)
internal/manager/utils/kongconfig/root.go	50.0% <ø> (ø)
internal/manager/telemetry/manager.go	39.3% <64.2%> (+2.7%)	⬆️
...nternal/controllers/gateway/tlsroute_controller.go	71.4% <0.0%> (-2.1%)	⬇️
internal/dataplane/kongstate/service.go	66.0% <0.0%> (-1.3%)	⬇️
internal/dataplane/parser/parser.go	90.7% <0.0%> (-0.9%)	⬇️
...ternal/controllers/gateway/httproute_controller.go	71.6% <0.0%> (+1.8%)	⬆️

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