Mjschanne/add patient fields

[mjschanne]

This pull request primarily focuses on renaming and modifying the CreateIndex class to UpsertIndex in the src/IndexOrchestration/Functions/UpsertIndex.cs file, adding PatientFirstName and PatientLastName fields to various files, and removing some unnecessary fields and configurations.

Here are the most important changes:

Renaming and Modifying CreateIndex to UpsertIndex:

• src/IndexOrchestration/Functions/UpsertIndex.cs: The CreateIndex class has been renamed to UpsertIndex. All instances of CreateIndex in this file have been replaced with UpsertIndex. The CreateIndexAsync method has been replaced with CreateOrUpdateIndexAsync to reflect the new functionality of the class. [1] [2]

Adding PatientFirstName and PatientLastName fields:

• src/IndexOrchestration/Functions/UpsertIndex.cs: Added PatientFirstName and PatientLastName to the SemanticField and SearchableField in the Run method. [1] [2]
• src/IndexOrchestration/IndexFields.cs: Added PatientFirstName and PatientLastName constants.
• src/IndexOrchestration/Models/SourceNoteRecord.cs: Added PatientFirstName and PatientLastName fields to the SourceNoteRecord class. [1] [2]

Removing Unnecessary Fields and Configurations:

• src/IndexOrchestration/Models/SourceNoteRecord.cs: Removed NoteInHtml and NoteInText fields from the SourceNoteRecord class. [1] [2]
• src/IndexOrchestration/host.json: Removed the logLevel configuration.
• src/IndexOrchestration/local.settings.example.json: Removed FHIRAuthClientId, FHIRAuthClientSecret, FHIRAuthResource, FHIRAuthTenantId, and FHIRServerUrl configurations.

Minor Changes:

• src/IndexOrchestration/Functions/DeleteIndex.cs: Changed the Function attribute from using nameof(DeleteIndex) to a string literal "DeleteIndex".