Switch to python generated source

[LakshanF]

Switching to genEventing and genEventPipe python scripts to generate provider source files from the universal event list filtered by a file, gen-eventing-event-inc.lst. This list file will make it easy to add new native AOT supported events and the scripts will build the right set of provider source files. The Etw provider source generation script, genEtwProvider, will be checked in later.

[ghost]

Tagging subscribers to this area: @agocke, @MichalStrehovsky, @jkotas
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Switching to genEventing and genEventPipe python scripts. Etw provider switch, genEtwProvider, is not included yet. genEventing script is currently using execute_process instead of add_custom_command to generate the source files.

Author:	LakshanF
Assignees:	LakshanF
Labels:	area-NativeAOT-coreclr
Milestone:	9.0.0

[elinor-fung]

cc @davmason - in case you're interested in the updates to genEventing and genEventPipe python scripts

[elinor-fung]

Yay!

[lateralusX]

Possible to run a mono build with changed scripts and validate that the generated providers and headers are still the same after this change? I believe we should do similar with CoreCLR as well.

[LakshanF]

/azp run runtime-extra-platforms

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[LakshanF]

Possible to run a mono build with changed scripts and validate that the generated providers and headers are still the same after this change? I believe we should do similar with CoreCLR as well.

Mono will have some changes in the generated header files, clreventpipewriteevents.h and clretwallmain.h, which now with the --inclist arg, will only include the events that are defined in gen-eventing-event-inc.lst.

CoreCLR seems to have generated (prior to this change) mono profiler events and filed #91687 to track that.