Update NRDiag to validate all necessary environment variables

[chynesNR]

The NRDiag tool used by Support checks for some required .NET environment variables, like COR_ENABLE_PROFILING, but not all of them. We should update the .NET portion of the utility to be a bit more thorough.

Here is where that logic lives: https://github.com/newrelic/newrelic-diagnostics-cli/blob/9658d9c9a026423593de56da9e7be0902268e2bb/tasks/dotnet/profiler/envVarKey_windows.go#L72

Note that the tool is written in Go. Assistance from other teams may be necessary.

Estimates

M

[workato-integration]

https://issues.newrelic.com/browse/NR-150808