Support for multiple .Net profilers simultaneously by implementing Microsoft CLRInstrumentationEngine

[GeorgeGkinis]

Is your feature request related to a problem? Please describe.
We are already running an .NET instrumentation from another company.
Unfortunately it is still needed.

We would like to use the Elastic .Net APM agent in conjunction with the profiler already used.

We tried to use https://github.com/microsoft/CLRInstrumentationEngine but the MicrosoftInstrumentationEngine_x64.dll is not to be found in the Elastic APM directory structure.

Describe the solution you'd like
We would like to run our Elastic Agent in conjunction with other .Net APM profilers
This would mean that the Elastic APM .Net agent is on-boarded to the ClrInstrumentationEngine

After that We could run more than one profiler simultaneously!

Describe alternatives you've considered
We followed the steps described here:
https://github.com/microsoft/CLRInstrumentationEngine/blob/main/docs/getting_started.md