Implementation of MCP e2e test

[blublinsky]

Description

This PR adds automated end-to-end tests for MCP (Model Context Protocol) integration, covering tool discovery, authentication methods (file-based, Kubernetes token passthrough, client-provided headers), tool filtering, graceful error handling, and tool approval workflows. The tests run both locally against a manually-started mock server and on-cluster in CI, where the mock server is deployed as a pod.

Test implemented:

1. test_discovery_endpoint_lists_client_auth_servers |
2. test_wrong_url_graceful_degradation mock-bad-url is unreachable
3. test_query_without_client_headers
4. test_query_with_client_headers
5. test_readonly_tool_skips_approval
6. test_tool_no_annotation_approved - Tool with no annotations requires approval; approving lets it execute (streaming)
7. test_tool_readonly_false_approved -Tool with readOnlyHint=false requires approval; approving lets it execute (streaming)
8. test_tool_approval_denied
9. test_tool_approval_timeout

Type of change

• Refactor
• [x ] New feature
• Bug fix
• CVE fix
• Optimization
• Documentation Update
• Configuration Update
• Bump-up dependent library
• Bump-up library or tool used for development (does not change the final image)
• CI configuration change
• Konflux configuration change

Related Tickets & Documents

• Related Issue #
  https://redhat.atlassian.net/browse/OLS-2829
• Closes #
  https://redhat.atlassian.net/browse/OLS-2829

Checklist before requesting a review

• I have performed a self-review of my code.
• PR has passed all pre-merge test jobs.
• If it is a core feature, I have added thorough tests.

Testing

• Please provide detailed steps to perform tests related to this code change.
• How were the fix/results from this change verified? Please provide relevant screenshots or results.

[blublinsky]

/retest

[JoaoFula]

/lgtm

[blublinsky]

/retest

[openshift-ci]

@blublinsky: all tests passed!

Full PR test history. Your PR dashboard.

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[JoaoFula]

/lgtm

[blublinsky]

/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: blublinsky

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