Add Qdrant health check

[timheuer]

What this PR does / why we need it: Adds a healthcheck for the Qdrant client

Which issue(s) this PR fixes:

Please reference the issue this PR will close: #2186

Special notes for your reviewer: First time implementing the health checks in this repo

Does this PR introduce a user-facing change?: New health check

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• [x] Code compiles correctly
• [x] Created/updated tests
• [x] Unit tests passing
• [ ] End-to-end tests passing
• [x] Extended the documentation
• [ ] Provided sample for the feature