Enhancement: Function Support for Canvas App Instrumentation Key

[improving-jeffd]

Adding instrumentation key is a nice way to trace all the events in Azure AppInsights but hard-coding it defeats the purpose. When we deploy the App from DEV to QA or to PROD we would like to use different Instrumentation Key per environment.

Current work arounds are to manually edit the App in downstream environments, or Unpack -> string replace the key -> pack in your pipelines. That second approach feels somewhat hacky and breaks when you have complex Canvas Apps that use features not supported with Unpack/Pack (Haven't tried the latest PAC CLI Update that made some strides here, so I'll check that out).

In the meantime though, the idea is to make Instrumentation Key accept a function so we can set it dynamically. For example, by using Environment Variable which will store the instrumentation key which can also be part of ALM process.

Credit to Power Maverick from the following PowerApps Ideas post:
https://ideas.powerapps.com/d365community/idea/f04de441-4b7a-4e30-a681-4626a796d38a