Makes the TCPRoute controller optional

[danehans]

Description

Fixes #10304

API changes

None

Code changes

• Conditionally adds the Gateway API v1beta2 scheme.
• Adds a testing scheme that unconditionally adds the Gateway API v1beta2 scheme. Updates tests throughout to use this scheme.
• Adds CRDs sets.Set[string] to the GatewayConfig type. CRDs defines the set of discovered Gateway API CRDs.
• Updates addIndexes() to conditionally add the TCPRoute index based on the presence of the tcproutes.gateway.networking.k8s.io CRD.
• Updates watchTcpRoute() to conditionally watch TCPRoute kinds based on the presence of the tcproutes.gateway.networking.k8s.io CRD.
• Updates NewControllerBuilder() to conditionally add the TCPRoute controller based on the presence of the tcproutes.gateway.networking.k8s.io CRD.
• Removes requiredCRDsExist from the NewData type since it's no longer needed (not making an API call to check for the .tcproutes.gateway.networking.k8s.io CRD). Removes all references to this field.

CI changes

Updates the scheme used by tests.

Docs changes

N/A

Context

Interesting decisions

Testing steps

• Create a kind cluster using the CI script.
• Run e2e tests.
• Tests pass
• Remove the tcproutes.gateway.networking.k8s.io CRD (installed by default).
• Run e2e tests.
• All tests except TCPRoute pass.

Checklist:

• [X] I have performed a self-review of my own code
• [X] I have commented my code, particularly in hard-to-understand areas
• [X] I have made corresponding changes to the documentation
• [X] I have added tests that prove my fix is effective or that my feature works

[solo-changelog-bot[bot]]

Issues linked to changelog: https://github.com/solo-io/gloo/issues/10304

[danehans]

The failing CI test is passing when run locally:

$ go test -v ./projects/gateway2/setup
...
--- PASS: TestScenarios (32.05s)
    --- PASS: TestScenarios/failover-default-diffns (1.10s)
    --- PASS: TestScenarios/failover-default (1.15s)
    --- PASS: TestScenarios/failover (1.13s)
    --- PASS: TestScenarios/happypath (1.13s)
    --- PASS: TestScenarios/listeneropts (1.06s)
PASS
ok      github.com/solo-io/gloo/projects/gateway2/setup 32.117s

Rebasing to try resolving the CI failure.