fix: set accepted even if gateway could not be programmed and attach route to listener even if listener not ready

[randmonkey]

What this PR does / why we need it:

To pass the conformance test GatewayWithAttachedRoutes, the PR:

• Set Accepted of listener to true even if the listener could not be Programmed
• Attach routes to listeners even if the listener is not ready

Which issue this PR fixes:

fixes #4982

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

Attention: 11 lines in your changes are missing coverage. Please review.

Comparison is base (0422f3b) 75.3% compared to head (533a4b6) 73.1%.
Report is 4 commits behind head on main.

❗ Current head 533a4b6 differs from pull request most recent head e39fd2c. Consider uploading reports for the commit e39fd2c to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #4987     +/-   ##
=======================================
- Coverage   75.3%   73.1%   -2.2%     
=======================================
  Files        167     167             
  Lines      18721   18843    +122     
=======================================
- Hits       14104   13788    -316     
- Misses      3790    4227    +437     
- Partials     827     828      +1     

Files	Coverage Δ
...ternal/controllers/gateway/grpcroute_controller.go	71.6% <100.0%> (ø)
...ternal/controllers/gateway/httproute_controller.go	67.0% <100.0%> (-10.2%)	⬇️
...nternal/controllers/gateway/tlsroute_controller.go	75.7% <100.0%> (ø)
...nternal/controllers/gateway/tcproute_controller.go	16.0% <0.0%> (ø)
...nternal/controllers/gateway/udproute_controller.go	16.0% <0.0%> (ø)
internal/controllers/gateway/route_utils.go	82.1% <91.1%> (-3.3%)	⬇️
internal/controllers/gateway/gateway_utils.go	83.4% <86.1%> (-0.8%)	⬇️

... and 28 files with indirect coverage changes

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[randmonkey]

The current main branch of gateway API has merged PR kubernetes-sigs/gateway-api#2535 that expect Accepted of HTTPRoute is false, and does not check the Accepted status of the listener.

[programmer04]

typos

[randmonkey]

marked this as "do not merge" since the latest version of gateway API changed expected "Accepted" condition of tested HTTPRoute to false and does not check the "Accepted" condition of the listener. This change is brought by the PR kubernetes-sigs/gateway-api#2535.