Alter RuntimeComponentManifest.targets to use the correct runtime pack

[steveisok]

When trying to process what runtime components are available, we were assuming %(ResolvedRuntimePack.PackageDirectory) would give us the correct Microsoft.NETCore.App runtime pack. Unfortunately, the ordering was likely altered when we started setting items in the Mono workload. Since relying on position of the items isn't reliable, we will instead use %(ResolvedFrameworkReference) to tell us which runtime pack is active and where it's located.

Fixes #56299

[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.

[lambdageek]

Should we have a check somewhere that @(ResolvedFrameworkReference->WithMetadataValue('Identity', 'Microsoft.NETCore.App')->Count()) == 1 ?

[rolfbjarne]

If I apply this fix locally, it works.

[radical]

Wasm workload tests are failing with:

 The "MonoRuntimeComponentManifestReadTask" task failed unexpectedly. [/datadisks/disk1/work/B43109B2/w/A32D0938/e/qql1xr5s.l1p/rebuild_Release_True.csproj]
 System.IO.DirectoryNotFoundException: Could not find a part of the path '/datadisks/disk1/work/B43109B2/w/A32D0938/e/qql1xr5s.l1p/ [/datadisks/disk1/work/B43109B2/w/A32D0938/e/qql1xr5s.l1p/rebuild_Release_True.csproj]
         /datadisks/disk1/work/B43109B2/p/dotnet-workload/packs/Microsoft.NETCore.App.Runtime.Mono.browser-wasm/6.0.0-ci\runtimes\browser-wasm\build\RuntimeComponentManifest.json [/datadisks/disk1/work/B43109B2/w/A32D0938/e/qql1xr5s.l1p/rebuild_Release_True.csproj]
       '. [/datadisks/disk1/work/B43109B2/w/A32D0938/e/qql1xr5s.l1p/rebuild_Release_True.csproj]
    at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String path, OpenFlags flags, Int32 mode) in System.Private.CoreLib.dll:token 0x60000d5+0x0 [/datadisks/disk1/work/B43109B2/w/A32D0938/e/qql1xr5s.l1p/rebuild_Release_True.csproj]
    at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize) in System.Private.CoreLib.dll:token 0x60000d9+0x31 [/datadisks/disk1/work/B43109B2/w/A32D0938/e/qql1xr5s.l1p/rebuild_Release_True.csproj]
    at System.IO.Strategies.OSFileStreamStrategy..ctor(String path, FileMode mode, FileAccess access, FileShare share, FileOptions options, Int64 preallocationSize) in System.Private.CoreLib.dll:token 0x6006142+0x78 [/datadisks/disk1/work/B43109B2/w/A32D0938/e/qql1xr5s.l1p/rebuild_Release_True.csproj]
    at System.IO.File.OpenRead(String path) in System.Private.CoreLib.dll:token 0x6005cbb+0x9 [/datadisks/disk1/work/B43109B2/w/A32D0938/e/qql1xr5s.l1p/rebuild_Release_True.csproj]
    at JsonToItemsTaskFactory.JsonToItemsTaskFactory.JsonToItemsTask.TryGetJson(String jsonFilePath, JsonModelRoot& json) in JsonToItemsTaskFactory.dll:token 0x6000019+0x2 [/datadisks/disk1/work/B43109B2/w/A32D0938/e/qql1xr5s.l1p/rebuild_Release_True.csproj]
    at JsonToItemsTaskFactory.JsonToItemsTaskFactory.JsonToItemsTask.Execute() in JsonToItemsTaskFactory.dll:token 0x6000018+0x1f [/datadisks/disk1/work/B43109B2/w/A32D0938/e/qql1xr5s.l1p/rebuild_Release_True.csproj]
    at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute() in Microsoft.Build.dll:token 0x60015fb+0x3e [/datadisks/disk1/work/B43109B2/w/A32D0938/e/qql1xr5s.l1p/rebuild_Release_True.csproj]
    at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask(ITaskExecutionHost taskExecutionHost, TaskLoggingContext taskLoggingContext, TaskHost taskHost, ItemBucket bucket, TaskExecutionMode howToExecuteTask) in Microsoft.Build.dll:token 0x600147a+0x804 [/datadisks/disk1/work/B43109B2/w/A32D0938/e/qql1xr5s.l1p/rebuild_Release_True.csproj]

And that seems to be because the json path is:

                   Set Property: _MonoRuntimeComponentManifestJsonFilePath=
                           /datadisks/disk1/work/B43109B2/p/dotnet-workload/packs/Microsoft.NETCore.App.Runtime.Mono.browser-wasm/6.0.0-ci\runtimes\browser-wasm\build\RuntimeComponentManifest.json

                   Initializing task factory "JsonToItemsTaskFactory.JsonToItemsTaskFactory" from assembly "/datadisks/disk1/work/B43109B2/p/dotnet-workload/packs/Microsoft.NET.Runtime.MonoTargets.Sdk/6.0.0-ci/Sdk/../tasks/net6.0/JsonToItemsTaskFactory.dll".

Note the newlines in the path.

fix:

1. don't use newlines when setting the path
2. The task should check the path, and log an error

[lambdageek]

[radical]

wasm Workload tests failing with:

/datadisks/disk1/work/AB8D0934/p/dotnet-workload/packs/Microsoft.NET.Runtime.MonoTargets.Sdk/6.0.0-ci/Sdk/RuntimeComponentManifest.targets(3,5): error : Empty ResolveFrameworkReference.RuntimePackPath while trying to read runtime components manifest

I'll try this out locally.