Gateway API: add support for TCPRoute

[skriss]

Closes #5321.

[codecov]

Codecov Report

Merging #5471 (ca6d1b2) into main (4542800) will decrease coverage by 0.16%.
The diff coverage is 68.32%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5471      +/-   ##
==========================================
- Coverage   78.28%   78.12%   -0.16%     
==========================================
  Files         138      139       +1     
  Lines       18648    18833     +185     
==========================================
+ Hits        14599    14714     +115     
- Misses       3768     3835      +67     
- Partials      281      284       +3     

Impacted Files	Coverage Δ
internal/controller/tcproute.go	0.00% <0.00%> (ø)
internal/dag/dag.go	98.68% <ø> (ø)
internal/debug/dot.go	49.54% <0.00%> (-5.46%)	⬇️
internal/status/routeconditions.go	48.67% <0.00%> (-5.25%)	⬇️
cmd/contour/serve.go	19.91% <16.66%> (-0.12%)	⬇️
internal/dag/gatewayapi_processor.go	93.84% <88.78%> (-0.51%)	⬇️
internal/dag/accessors.go	86.99% <100.00%> (+0.17%)	⬆️
internal/dag/builder.go	93.33% <100.00%> (+0.35%)	⬆️
internal/dag/cache.go	95.08% <100.00%> (+0.15%)	⬆️
internal/gatewayapi/listeners.go	100.00% <100.00%> (ø)
... and 4 more

[sunjayBhatia]

nice! basically we add a new property on a listener separate from virtualhost since with plain tcp we can't do any sni/hostname routing and set up the tcp proxy filter accordingly 👍🏽

wdyt about an e2e test for this? might be a while until there is a relevant one in upstream

[skriss]

wdyt about an e2e test for this? might be a while until there is a relevant one in upstream

I added a basic one, I should probably also circle back and add one to the provisioner suite for a Gateway with many Listener ports, and can include a TCP listener as part of that, just to exercise the non-standard ports. Will do that in a separate PR.