* [wasm] Move stable jobs from runtime-staging to runtime

- library tests: windows
- AOT tests: windows
- Debugger tests (chrome): windows, and linux
- Wasm.Build.Tests: windows

* Move last remaining wasm-firefox tests to runtime too

* Move firefox debugger tests to runtime-extra-platforms

* Fix browser-eventpipe build

```
src/mono/sample/wasm/browser-eventpipe/Program.cs(80,13): error IDE0074: (NETCORE_ENGINEERING_TELEMETRY=Build) Use compound assignment
```