refactor(conformance): move some common resources to shared place and add EPP service to tests needed.

[zetxqx]

Basic refactor, moved some common resources to resources folder.

The resource I moved to resources folder are:

1. EPP service for primary pool named primary-endpoint-picker-svc
2. EPP service for secondary pool named secondary-endpoint-picker-svc
3. Primary Inference Pool named: primary-inference-pool
4. Primary Inference model named: primary-inference-model-server
5. Secondary Inference Pool named: secondary-inference-pool
6. Secondary Inference model named: secondary-inference-pool
7. primary gateway named: conformance-primary-gateway
8. secondary gateway named: conformance-secondary-gateway

Tested against istio(some newly added tests failed but the major conflict from HTTPRouteMultipleRulesDifferentPools I resolved does not fail)

go test -v ./conformance -args -debug -gateway-class istio -cleanup-base-resources=false

=== NAME  TestConformance
    conformance.go:205: Generating Inference Extension conformance report
    conformance.go:322: Conformance report written to ./my-first-report.yaml
--- PASS: TestConformance (213.72s)
    --- PASS: TestConformance/HTTPRouteInvalidInferencePoolRef (60.19s)
        --- PASS: TestConformance/HTTPRouteInvalidInferencePoolRef/HTTPRoute_should_have_Accepted=True_and_ResolvedRefs=False_for_non-existent_InferencePool (60.00s)
    --- PASS: TestConformance/InferencePoolAccepted (40.24s)
        --- PASS: TestConformance/InferencePoolAccepted/InferencePool_should_have_Accepted_condition_set_to_True (40.02s)
    --- FAIL: TestConformance/InferencePoolInvalidEPPService (91.12s)
        --- FAIL: TestConformance/InferencePoolInvalidEPPService/HTTPRoute_has_a_ResolvedRefs_Condition_with_status_False_and_Reason_BackendNotFound (60.00s)
        --- FAIL: TestConformance/InferencePoolInvalidEPPService/Request_to_a_route_with_an_invalid_backend_reference_receives_a_500_response (30.00s)
    --- PASS: TestConformance/HTTPRouteMultipleRulesDifferentPools (1.61s)
        --- PASS: TestConformance/HTTPRouteMultipleRulesDifferentPools/Wait_for_resources_to_be_accepted (1.15s)
        --- PASS: TestConformance/HTTPRouteMultipleRulesDifferentPools/Traffic_should_be_routed_to_the_correct_pool_based_on_path (0.19s)
            --- PASS: TestConformance/HTTPRouteMultipleRulesDifferentPools/Traffic_should_be_routed_to_the_correct_pool_based_on_path/request_to_primary_pool (0.01s)
            --- PASS: TestConformance/HTTPRouteMultipleRulesDifferentPools/Traffic_should_be_routed_to_the_correct_pool_based_on_path/request_to_secondary_pool (0.01s)
    --- PASS: TestConformance/InferencePoolResolvedRefsCondition (16.78s)
        --- PASS: TestConformance/InferencePoolResolvedRefsCondition/InferencePool_should_show_Accepted:True_by_parents_and_be_routable_via_multiple_HTTPRoutes (0.04s)
        --- PASS: TestConformance/InferencePoolResolvedRefsCondition/Delete_httproute-for-primary-gw_and_verify_InferencePool_status_and_routing_via_secondary_gw (5.11s)
        --- PASS: TestConformance/InferencePoolResolvedRefsCondition/Delete_httproute-for-secondary-gw_and_verify_InferencePool_has_no_parent_statuses_and_is_not_routable (10.27s)
FAIL
FAIL	sigs.k8s.io/gateway-api-inference-extension/conformance	213.908s
FAIL

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[k8s-ci-robot]

Hi @zetxqx. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[ahg-g]

/assign @SinaChavoshi

/ok-to-test

[k8s-ci-robot]

@ahg-g: GitHub didn't allow me to assign the following users: SinaChavoshi.

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In response to this:

/assign @SinaChavoshi

/ok-to-test

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[robscott]

Thanks @zetxqx, this is a great simplification!

/lgtm
/cc @kfswain @danehans

[SinaChavoshi]

Nice work, thank you for refactoring / cleaning up the repo!

[k8s-ci-robot]

New changes are detected. LGTM label has been removed.

[zetxqx]

@robscott @SinaChavoshi could you take another look?

[SinaChavoshi]

/lgtm

[k8s-ci-robot]

@SinaChavoshi: changing LGTM is restricted to collaborators

In response to this:

/lgtm

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: robscott, SinaChavoshi, zetxqx
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