chore(deps) update to GWAPI 0.7.1

[rainest]

What this PR does / why we need it:

GWAPI upgrades and a conformance fix.

Which issue this PR fixes:

Fix #3726
Fix #2953
Fix #3990

Special notes for your reviewer:

kubernetes-sigs/gateway-api#1888 and kubernetes-sigs/gateway-api#1832 (comment) change expectations around statuses. This PR includes changes that adhere to the 0.7.1 conformance test informed by these changes, but it's possible we missed something not covered in conformance. GWAPI doesn't really provide an expected state flowchart for statuses (we have to go off individual condition descriptions in the API docs), which makes it a bit difficult to determine if our state changes are truly correct absent conformance tests.

Changes to conformance suite covered in:

#4166
#4165
#4164

Also skips mesh stuff but no issue for that as I assume we have no intention to implement that for Kong-based products.

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

Patch coverage: 34.7% and no project coverage change.

Comparison is base (f1b345b) 60.6% compared to head (71a1e09) 60.6%.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #4142   +/-   ##
=====================================
  Coverage   60.6%   60.6%           
=====================================
  Files        150     150           
  Lines      16843   16822   -21     
=====================================
- Hits       10213   10201   -12     
+ Misses      5984    5976    -8     
+ Partials     646     645    -1     

Impacted Files	Coverage Δ
internal/controllers/gateway/gateway_controller.go	12.8% <0.0%> (+0.2%)	⬆️
...ternal/controllers/gateway/grpcroute_controller.go	8.8% <0.0%> (ø)
...ternal/controllers/gateway/httproute_controller.go	51.4% <0.0%> (+0.9%)	⬆️
...nternal/controllers/gateway/tcproute_controller.go	8.6% <0.0%> (ø)
...nternal/controllers/gateway/tlsroute_controller.go	8.8% <0.0%> (ø)
...nternal/controllers/gateway/udproute_controller.go	8.6% <0.0%> (ø)
internal/dataplane/parser/parser.go	74.8% <0.0%> (-0.6%)	⬇️
internal/util/conditions.go	100.0% <ø> (ø)
internal/controllers/gateway/gateway_utils.go	43.9% <50.0%> (-0.9%)	⬇️
internal/controllers/gateway/route_utils.go	76.8% <50.0%> (ø)
... and 2 more

... and 1 file with indirect coverage changes

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[rainest]

More rebases since something happened in main that Github thought was a conflict, but wasn't? Dunno, fetch and rebase to origin/main didn't actually raise any conflicts in test/envtest/httproute_controller_test.go, which is the file Github didn't like.