(harness) More verbose readiness logs

[charlesbluca]

Description

Wrote this up to troubleshoot issues I was having waiting on Milvus readiness, and then to disable waiting on Milvus readiness if we are using the LanceDB backend

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.
• If adjusting docker-compose.yaml environment variables have you ensured those are mimicked in the Helm values.yaml file.