Following PR #4146, MCP tests now work in server mode. Updated tests to:
- Replace compat_client with responses_client
- Remove LlamaStackAsLibraryClient skip checks
- Remove replay mode skip marker
Tests can now run in both library and server modes without skipping.
These tests use local in-process MCP servers and don't require external
API calls or recordings. They can run in both replay and record modes
without issues since they don't depend on pre-recorded API responses.
Fixed incorrect import in test_mcp_authentication.py:
- Changed: from llama_stack import LlamaStackAsLibraryClient
- To: from llama_stack.core.library_client import LlamaStackAsLibraryClient
This aligns with the correct import pattern used in other test files.
