fix: change existing resolvedRef condition to avoid duplicates

[randmonkey]

What this PR does / why we need it:

change exsiting resolvedRefs condition in HTTPRoute when there is already one in status to avoid multiple appearances of conditions with same type.

Which issue this PR fixes:

Special notes for your reviewer:

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: 74.0% // Head: 74.1% // Increases project coverage by +0.0% 🎉

Coverage data is based on head (73e1c70) compared to base (2d565d2).
Patch coverage: 73.3% of modified lines in pull request are covered.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #3386   +/-   ##
=====================================
  Coverage   74.0%   74.1%           
=====================================
  Files        110     110           
  Lines      13284   13288    +4     
=====================================
+ Hits        9837    9850   +13     
+ Misses      2822    2815    -7     
+ Partials     625     623    -2     

Impacted Files	Coverage Δ
...ternal/controllers/gateway/httproute_controller.go	57.8% <73.3%> (+1.1%)	⬆️
...nternal/controllers/gateway/tcproute_controller.go	73.0% <0.0%> (-2.7%)	⬇️
internal/dataplane/kongstate/service.go	66.0% <0.0%> (-1.3%)	⬇️
internal/dataplane/parser/parser.go	92.1% <0.0%> (+1.6%)	⬆️
...nternal/controllers/gateway/tlsroute_controller.go	75.8% <0.0%> (+2.6%)	⬆️

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