OLS-3150: Add googleCloudVertex.modelProvider to LLMProvider CRD

[onmete]

Summary

• Add GoogleCloudVertexModelProvider enum (Anthropic, Google, OpenAI) to distinguish which model provider stack a Vertex LLMProvider uses
• Add required googleCloudVertex.modelProvider field on LLMProvider (CRD validation enforces presence and enum values)
• Update example manifest and test fixtures to set modelProvider: Anthropic

This PR is API/CRD only and should merge first. Operator routing that maps modelProvider to sandbox SDK env vars will land in OLS-3126 / PR #13, which consumes this field once the CRD is available.

Fixes OLS-3150 (CRD half).

modelProvider values

modelProvider	Vertex stack (operator mapping in PR #13)
Anthropic	Claude SDK (LIGHTSPEED_AGENT_PROVIDER=claude)
Google	Google GenAI (LIGHTSPEED_AGENT_PROVIDER=gemini)
OpenAI	OpenAI-compatible API (LIGHTSPEED_AGENT_PROVIDER=openai)

Example

spec:
  type: GoogleCloudVertex
  googleCloudVertex:
    credentialsSecret:
      name: llm-credentials
    projectID: my-gcp-project
    region: us-central1
    modelProvider: Anthropic

Test plan

• make manifests
• make test

[openshift-ci-robot]

@onmete: This pull request references OLS-3150 which is a valid jira issue.

Warning: The referenced jira issue has an invalid target version for the target branch this PR targets: expected the bug to target the "5.0.0" version, but no target version was set.

Details

In response to this:

Summary

• Add GoogleCloudVertexRuntime enum (Claude, Gemini, OpenAI) to distinguish which SDK stack a Vertex LLMProvider uses
• Add required googleCloudVertex.runtime field on LLMProvider (CRD validation enforces presence and enum values)
• Update example manifest and test fixtures to set runtime: Claude

This is API/CRD only — no operator sandbox env patching. Operator routing is a separate follow-up after OLS-3126 / PR #13 lands.

Fixes OLS-3150 (CRD half).

Test plan

• make manifests
• make test

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[openshift-ci]

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[openshift-ci]

@onmete: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/unit	172226f	link	true	/test unit
ci/prow/generate	172226f	link	true	/test generate

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