Python: bump misc-integration retry delay to 30s (#5293)

The misc-integration job (Anthropic, Ollama, MCP) frequently fails on merge to main when the upstream MCP server (e.g. learn.microsoft.com/api/mcp) returns a transient rate-limit error. The previous 5s retry delay is too short to ride out the upstream backoff window, so all retries fail and the merge queue is blocked. Bumping to 30s gives the upstream a chance to recover before pytest-retry re-runs the test.

.github/workflows/python-integration-tests.yml

@@ -171,7 +171,7 @@ jobs:
           -m integration
           -n logical --dist worksteal
           --timeout=120 --session-timeout=900 --timeout_method thread
-          --retries 2 --retry-delay 5
+          --retries 2 --retry-delay 30
       - name: Stop local MCP server
         if: always()
         shell: bash

.github/workflows/python-merge-tests.yml

@@ -287,7 +287,7 @@ jobs:
           -m integration
           -n logical --dist worksteal
           --timeout=120 --session-timeout=900 --timeout_method thread
-          --retries 2 --retry-delay 5
+          --retries 2 --retry-delay 30
           --junitxml=pytest.xml
         working-directory: ./python
       - name: Stop local MCP server