[wasm][workload] Use the emsdk workload manifest for the emscripten packages

[lewing]

Switch to the emscripten workload manifest for the emsdk packs.

This is #54349 with the mobile changes removed again because we decided to validate them separately.

[dotnet-issue-labeler]

I couldn't figure out the best area label to add to this PR. If you have write-permissions please help me learn by adding exactly one area label.

[ghost]

Tagging subscribers to 'arch-wasm': @lewing
See info in area-owners.md if you want to be subscribed.

Issue Details

---

Switch to the emscripten workload manifest for the emsdk packs.

This is #54349 with the mobile changes removed again because we decided to validate them separately.

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

[lewing]

strange crash on coreclr Linux_musl arm64 Release

+ /root/helix/work/correlation/scripts/4cd7fc5757d94130863d09cbce5dd169/execute.sh
+ ./RunTests.sh --runtime-path /root/helix/work/correlation
----- start Sat Jul 3 03:54:00 UTC 2021 =============== To repro directly: =====================================================
pushd .
/root/helix/work/correlation/dotnet exec --runtimeconfig System.Text.Json.Tests.runtimeconfig.json --depsfile System.Text.Json.Tests.deps.json xunit.console.dll System.Text.Json.Tests.dll -xml testResults.xml -nologo -nocolor -notrait category=IgnoreForCI -notrait category=OuterLoop -notrait category=failing 
popd
===========================================================================================================
/root/helix/work/workitem /root/helix/work/workitem
  Discovering: System.Text.Json.Tests (method display = ClassAndMethod, method display options = None)
  Discovered:  System.Text.Json.Tests (found 2639 of 2692 test cases)
  Starting:    System.Text.Json.Tests (parallel test collections = on, max threads = 4)
./RunTests.sh: line 162:    95 Segmentation fault      (core dumped) "$RUNTIME_PATH/dotnet" exec --runtimeconfig System.Text.Json.Tests.runtimeconfig.json --depsfile System.Text.Json.Tests.deps.json xunit.console.dll System.Text.Json.Tests.dll -xml testResults.xml -nologo -nocolor -notrait category=IgnoreForCI -notrait category=OuterLoop -notrait category=failing $RSP_FILE
/root/helix/work/workitem
----- end Sat Jul 3 03:55:02 UTC 2021 ----- exit code 139 ----------------------------------------------------------
exit code 139 means SIGSEGV Illegal memory access. Deref invalid pointer, overrunning buffer, stack overflow etc. Core dumped.
ulimit -c value: unlimited
[197632.392567] veth7fc058c: renamed from eth0
[197632.538802] docker0: port 1(veth7ae530d) entered disabled state
[197632.544504] device veth7ae530d left promiscuous mode
[197632.544510] docker0: port 1(veth7ae530d) entered disabled state
[197644.650091] docker0: port 1(veth84d74a2) entered blocking state
[197644.650098] docker0: port 1(veth84d74a2) entered disabled state
[197644.650266] device veth84d74a2 entered promiscuous mode
[197644.650472] IPv6: ADDRCONF(NETDEV_UP): veth84d74a2: link is not ready
[197644.650479] docker0: port 1(veth84d74a2) entered blocking state
[197644.650482] docker0: port 1(veth84d74a2) entered forwarding state

but unrelated to this change

[lewing]

Libraries Test Run release coreclr windows x86 Debug is #54034

System.Net.Http.WinHttpHandler.Functional.Tests.deps.json xunit.console.dll System.Net.Http.WinHttpHandler.Functional.Tests.dll -xml testResults.xml -nologo -nocolor -notrait category=IgnoreForCI -notrait category=OuterLoop -notrait category=failing  
  Discovering: System.Net.Http.WinHttpHandler.Functional.Tests (method display = ClassAndMethod, method display options = None)
  Discovered:  System.Net.Http.WinHttpHandler.Functional.Tests (found 292 of 517 test cases)
  Starting:    System.Net.Http.WinHttpHandler.Functional.Tests (parallel test collections = on, max threads = 2)
   System.Net.Http.WinHttpHandler.Functional.Tests: [Long Running Test] 'System.Net.Http.Functional.Tests.PlatformHandler_HttpClientHandler_Asynchrony_Test.ResponseHeadersRead_SynchronizationContextNotUsedByHandler', Elapsed: 00:02:11
   System.Net.Http.WinHttpHandler.Functional.Tests: [Long Running Test] 'System.Net.Http.Functional.Tests.PlatformHandler_HttpClientHandler_Asynchrony_Test.ResponseHeadersRead_SynchronizationContextNotUsedByHandler', Elapsed: 00:04:11
   System.Net.Http.WinHttpHandler.Functional.Tests: [Long Running Test] 'System.Net.Http.Functional.Tests.PlatformHandler_HttpClientHandler_Asynchrony_Test.ResponseHeadersRead_SynchronizationContextNotUsedByHandler', Elapsed: 00:06:11
   System.Net.Http.WinHttpHandler.Functional.Tests: [Long Running Test] 'System.Net.Http.Functional.Tests.PlatformHandler_HttpClientHandler_Asynchrony_Test.ResponseHeadersRead_SynchronizationContextNotUsedByHandler', Elapsed: 00:08:11
   System.Net.Http.WinHttpHandler.Functional.Tests: [Long Running Test] 'System.Net.Http.Functional.Tests.PlatformHandler_HttpClientHandler_Asynchrony_Test.ResponseHeadersRead_SynchronizationContextNotUsedByHandler', Elapsed: 00:10:11
   System.Net.Http.WinHttpHandler.Functional.Tests: [Long Running Test] 'System.Net.Http.Functional.Tests.PlatformHandler_HttpClientHandler_Asynchrony_Test.ResponseHeadersRead_SynchronizationContextNotUsedByHandler', Elapsed: 00:12:11
   System.Net.Http.WinHttpHandler.Functional.Tests: [Long Running Test] 'System.Net.Http.Functional.Tests.PlatformHandler_HttpClientHandler_Asynchrony_Test.ResponseHeadersRead_SynchronizationContextNotUsedByHandler', Elapsed: 00:14:11
['System.Net.Http.WinHttpHandler.Functional.Tests' END OF WORK ITEM LOG: Command timed out, and was killed]