feat: assign Service, Route and Consumer entities stable IDs

[czeslavo]

What this PR does / why we need it:

Uses the FillID function from go-kong to assign deterministic IDs for Service, Route, and Consumer Kong entities that are generated in the K8s -> Kong translation process.

Which issue this PR fixes:

Closes #3906.

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

[codecov]

Codecov Report

Patch coverage: 42.1% and project coverage change: -36.4 ⚠️

Comparison is base (eb974e7) 58.3% compared to head (30b8c97) 21.9%.

❗ Current head 30b8c97 differs from pull request most recent head 72a6a90. Consider uploading reports for the commit 72a6a90 to get more accurate results

Additional details and impacted files

@@           Coverage Diff            @@
##            main   #3933      +/-   ##
========================================
- Coverage   58.3%   21.9%   -36.4%     
========================================
  Files        141     137       -4     
  Lines      16191   16058     -133     
========================================
- Hits        9441    3524    -5917     
- Misses      6107   12040    +5933     
+ Partials     643     494     -149     

Impacted Files	Coverage Δ
internal/dataplane/kongstate/kongstate.go	21.5% <35.2%> (-47.8%)	⬇️
internal/dataplane/parser/parser.go	43.2% <100.0%> (-31.3%)	⬇️

... and 98 files with indirect coverage changes

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