[healthinsights] Migrate healthinsights projects to use snippets extraction (Azure#33164)

- @azure-rest/health-insights-cancerprofiling
- @azure-rest/health-insights-clinicalmatching
- @azure-rest/health-insights-radiologyinsights

- Azure#32416

Updates all projects under `healthinsights` to use snippets extraction.
there are more than one possible design, why was the one in this PR
chosen?
request PRs)_
- [ ] Added impacted package name to the issue description
- [ ] Does this PR needs any fixes in the SDK Generator?** _(If so,
create an Issue in the
[Autorest/typescript](https://github.com/Azure/autorest.typescript)
repository and link it here)_
- [ ] Added a changelog (if necessary)

Author: mpodwysocki