[Health Check] Limit of 30 seconds + retry

[fhibf]

Limiting Gen1 Health Check to a 30 seconds operation, and allowing this operation to be retried in case of CosmosOperationCanceledException.

Related issues

• Health Check taking more than 30 seconds to execute.

Testing

This change was tested locally. Multiple concurrent requests were executed to test the ability to handle multiple health check validations at the same time.

FHIR Team Checklist

• Update the title of the PR to be succinct and less than 65 characters
• Add a milestone to the PR for the sprint that it is merged (i.e. add S47)
• Tag the PR with the type of update: Bug, Build, Dependencies, Enhancement, New-Feature or Documentation
• Tag the PR with Open source, Azure API for FHIR (CosmosDB or common code) or Azure Healthcare APIs (SQL or common code) to specify where this change is intended to be released.
• CI is green before merge
• Review squash-merge requirements

Semver Change (docs)

Patch|Skip|Feature|Breaking (reason)