[wasm] Add incremental build support

[radical]

• Adds Inputs/Outputs to wasm targets, which msbuild can use for dependency checking

• Updates tasks to write out to the files being used as inputs, only when there is a change

• MonoAOTCompiler:

  • Compiles assemblies to .bc files.
  • Hashes for the .bc files are stored in a json cache file.
  • mono-aot-cross is used to compile .dll -> .bc.tmp
  • And the actual .bc file is overwritten only if the generated one is different
  • note: the cache is optional. this can be changed to be required, if iOS/android also adopt it

• EmccCompile.cs: Support a %(Dependencies) metadata on the source
  files, to compile the files only when needed.

• All the emcc args are written to rsp files, if different

  • and used as inputs/dependencies for the native output files

• Adds some tests

• Use msbuild's resource API, to request cores for building in parallel

• Also, updates the build output:

  Wasm.Console.Sample -> /Users/radical/dev/r2/src/mono/sample/wasm/console/bin/browser-wasm/publish/
  AOT'ing 7 assemblies
  [1/7] Wasm.Console.Sample.dll -> Wasm.Console.Sample.dll.bc
  [6/7] skipped unchanged assemblies.
  Compiling native assets with emcc. This may take a while ...
  Compiling assembly bitcode files...
  [1/1] Wasm.Console.Sample.dll.bc -> Wasm.Console.Sample.dll.o [took 0.612s]
  Linking with emcc. This may take a while ...

Fixes #51013

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Issue Details

---

null

Author:	radical
Assignees:	-
Labels:	area-Infrastructure-mono
Milestone:	-

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Issue Details

---

• Adds Inputs/Outputs to wasm targets, which msbuild can use for dependency checking

• Updates tasks to write out to the files being used as inputs, only when there is a change

• MonoAOTCompiler:

  • Compiles assemblies to .bc files.
  • Hashes for the .bc files are stored in a json cache file.
  • And uses .depfile generated by mono-aot-cross, to figure out the
    if any of the dependencies have changed
  • Writes out the actual .bc file only if the assembly, or it's
    dependencies changed

• EmccCompile.cs: Support a %(Dependencies) metadata on the source
  files, to compile the files only when needed.

• All the emcc args are written to rsp files, if different

  • and used as inputs/dependencies for the native output files

• Adds some tests

Fixes #51013

Author:	radical
Assignees:	-
Labels:	arch-wasm, area-Build-mono
Milestone:	-

[radical]

Splitting up the tests into separate jobs. So, disabled non-wasm jobs, to make sure that it's working.

[radical]

Ready for review

[lewing]

failure in runtime (Libraries Test Run checked coreclr windows x86 Release) is

C:\h\w\A8F309AF\w\A8620915\e>"C:\h\w\A8F309AF\p\dotnet.exe" exec --runtimeconfig System.Diagnostics.Process.Tests.runtimeconfig.json --depsfile System.Diagnostics.Process.Tests.deps.json xunit.console.dll System.Diagnostics.Process.Tests.dll -xml testResults.xml -nologo -nocolor -notrait category=IgnoreForCI -notrait category=OuterLoop -notrait category=failing  
  Discovering: System.Diagnostics.Process.Tests (method display = ClassAndMethod, method display options = None)
  Discovered:  System.Diagnostics.Process.Tests (found 254 of 278 test cases)
  Starting:    System.Diagnostics.Process.Tests (parallel test collections = on, max threads = 4)
    System.Diagnostics.Tests.ProcessModuleTests.LongModuleFileNamesAreSupported [FAIL]
      Assert.Contains() Failure
      Not found: C:\h\w\A8F309AF\t\ProcessModuleTests_otibjh1e.nwu\aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\LongPath.dll
      In value:  String[] ["C:\\h\\w\\A8F309AF\\p\\dotnet.exe", "C:\\Windows\\SYSTEM32\\ntdll.dll", "C:\\Windows\\System32\\KERNEL32.DLL", "C:\\Windows\\System32\\KERNELBASE.dll", "C:\\Windows\\System32\\ucrtbase.dll", ...]
      Stack Trace:
        /_/src/libraries/System.Diagnostics.Process/tests/ProcessModuleTests.cs(127,0): at System.Diagnostics.Tests.ProcessModuleTests.LongModuleFileNamesAreSupported()
    System.Diagnostics.Tests.ProcessStartInfoTests.ShellExecute_Nano_Fails_Start [SKIP]
      Condition(s) not met: "IsWindowsNanoServer"
Invalid number of parameters
0 File(s) copied
  Finished:    System.Diagnostics.Process.Tests
=== TEST EXECUTION SUMMARY ===

[lewing]

created #57452