ActivityHandler can handle a special InvokeActivity where the name is healthCheck.

This feature needs to be removed from the SDKs, we should also check that is not being used anywhere else and validate that we are not referencing it in the OBI documents.

Tracking Status

Dotnet SDK 5284

• PR Deprecate HealthCheck Activity botbuilder-dotnet#5352
• Merged

Javascript SDK 3374

• PR fix: remove HealthCheck code for #3374 botbuilder-js#3482
• Merged

Python SDK 1567

• PR
• Merged

Java SDK 1040

• PR
• Merged

Samples TODO if applies

• PR
• Merged

Docs TODO if applies

• PR
• Merged