[TA] Implementation to support FHIR

[maririos]

Fixes: #28328

[azure-sdk]

API change check for Azure.AI.TextAnalytics

API changes have been detected in Azure.AI.TextAnalytics. You can review API changes here

API changes

+         public FhirVersion? FhirVersion { get; set; }
+         public IReadOnlyDictionary<string, object> FhirBundle { get; }
+         [EditorBrowsable(EditorBrowsableState.Never)]
+         public static AnalyzeHealthcareEntitiesResult AnalyzeHealthcareEntitiesResult(string id, TextDocumentStatistics statistics, IEnumerable<HealthcareEntity> healthcareEntities, IEnumerable<HealthcareEntityRelation> entityRelations, IEnumerable<TextAnalyticsWarning> warnings, IDictionary<string, object> fhirBundle);

[deyaaeldeen]

Looks good. Perhaps one nitpicky thing to consider is mention a thing or two about FHIR protocol in the changelog to educate customers about the feature.

[maririos]

/azp run net - textanalytics - tests

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[maririos]

/azp run net - textanalytics - tests

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[maririos]

/azp run net - textanalytics - tests

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[maririos]

@jsquire My last commit includes the fix for this to work in both legacy and language clients. To keep it consistent with the work you did in legacy, I decided on not touching Transforms.Legacy and instead, having another constructor that takes the new parameters. Apologies for the iterations in the PR while figuring out best approach.
Let me know what you think.

[azure-sdk]

API change check

APIView has identified API level changes in this PR and created following API reviews.

Azure.AI.TextAnalytics

[maririos]

/azp run net - textanalytics - tests

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).