[wasm][mt] Fix few libraries projects

[radekdoulik]

Add $(NetCoreAppCurrent)-browser TFM to System.Linq.Parallel.csproj and use the platform identifier

Do not set FeatureWasmThreads in ref projects. These were never evaluated to true and we are building different set of these ref libraries in Microsoft.NET.WebAssembly.Threading.proj.

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Issue Details

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Add $(NetCoreAppCurrent)-browser TFM to System.Linq.Parallel.csproj and use the platform identifier

Do not set FeatureWasmThreads in ref projects. These were never evaluated to true and we are building different set of these ref libraries in Microsoft.NET.WebAssembly.Threading.proj.

Author:	radekdoulik
Assignees:	radekdoulik
Labels:	area-Infrastructure-libraries
Milestone:	-

[radekdoulik]

This is followup PR for #97505

All the libraries should be fine now.

> git grep FeatureWasmThreads .|grep TargetPlatformIdentifier|cut -f1 -d:|while read proj; do echo --- $proj ---; grep \<TargetFramework $proj; done
--- src/libraries/System.Linq.Parallel/src/System.Linq.Parallel.csproj ---
    <TargetFrameworks>$(NetCoreAppCurrent);$(NetCoreAppCurrent)-browser</TargetFrameworks>
--- src/libraries/System.Net.Http/src/System.Net.Http.csproj ---
    <TargetFrameworks>$(NetCoreAppCurrent)-windows;$(NetCoreAppCurrent)-linux;$(NetCoreAppCurrent)-osx;$(NetCoreAppCurrent)-freebsd;$(NetCoreAppCurrent)-maccatalyst;$(NetCoreAppCurrent)-ios;$(NetCoreAppCurrent)-tvos;$(NetCoreAppCurrent)-browser;$(NetCoreAppCurrent)-wasi;$(NetCoreAppCurrent)-illumos;$(NetCoreAppCurrent)-solaris;$(NetCoreAppCurrent)-haiku;$(NetCoreAppCurrent)-android;$(NetCoreAppCurrent)</TargetFrameworks>
--- src/libraries/System.Net.WebSockets.Client/src/System.Net.WebSockets.Client.csproj ---
    <TargetFrameworks>$(NetCoreAppCurrent);$(NetCoreAppCurrent)-browser</TargetFrameworks>
--- src/libraries/System.Runtime.InteropServices.JavaScript/src/System.Runtime.InteropServices.JavaScript.csproj ---
    <TargetFrameworks>$(NetCoreAppCurrent)-browser;$(NetCoreAppCurrent)</TargetFrameworks>
--- src/libraries/System.Runtime.InteropServices.JavaScript/src/System.Runtime.InteropServices.JavaScript.csproj ---
    <TargetFrameworks>$(NetCoreAppCurrent)-browser;$(NetCoreAppCurrent)</TargetFrameworks>
--- src/libraries/System.Runtime.InteropServices.JavaScript/src/System.Runtime.InteropServices.JavaScript.csproj ---
    <TargetFrameworks>$(NetCoreAppCurrent)-browser;$(NetCoreAppCurrent)</TargetFrameworks>
--- src/libraries/System.Runtime.InteropServices.JavaScript/tests/System.Runtime.InteropServices.JavaScript.UnitTests/System.Runtime.InteropServices.JavaScript.Tests.csproj ---
    <TargetFrameworks>$(NetCoreAppCurrent)-browser</TargetFrameworks>
--- src/libraries/System.Threading.Tasks.Parallel/src/System.Threading.Tasks.Parallel.csproj ---
    <TargetFrameworks>$(NetCoreAppCurrent);$(NetCoreAppCurrent)-browser</TargetFrameworks>

and in the src/libraries the TargetOS is now only used in helix related parts and tests

> git grep 'TargetOS.*=.*browser' src/libraries|grep -v test
src/libraries/sendtohelix-browser.targets:        <HelixTargetsFile Condition="'$(TargetOS)' == 'browser'">wasm.helix.targets</HelixTargetsFile>
src/libraries/sendtohelix-wasi.targets:        <HelixTargetsFile Condition="'$(TargetOS)' == 'browser'">wasm.helix.targets</HelixTargetsFile>
src/libraries/sendtohelix.proj:      <_TestUsingWebcilValues Include="true;false" Condition="'$(TargetOS)' == 'browser'" />
src/libraries/sendtohelix.proj:  <Target Condition="'$(Scenarios)' != '' and '$(TargetOS)' != 'browser' and '$(TargetOS)' != 'wasi' and '$(TargetOS)' != 'ios' and '$(TargetOS)' != 'iossimulator'" Name="CreateAllScenarioTestEnvFiles">
src/libraries/sendtohelixhelp.proj:  <Import Project="$(MSBuildThisFileDirectory)sendtohelix-browser.targets" Condition="'$(TargetOS)' == 'browser'" />
src/libraries/sendtohelixhelp.proj:  <Import Project="$(MSBuildThisFileDirectory)sendtohelix-mobile.targets" Condition="'$(TargetsMobile)' == 'true' and '$(TargetOS)' != 'browser' and '$(TargetOS)' != 'wasi'" />
src/libraries/sendtohelixhelp.proj:  <PropertyGroup Condition="'$(TargetOS)' == 'browser' or '$(TargetOS)' == 'wasi' or '$(TargetOS)' == 'android' or '$(TargetOS)' == 'ios' or '$(TargetOS)' == 'iossimulator' or '$(TargetOS)' == 'tvos' or '$(TargetOS)' == 'tvossimulator' or '$(TargetOS)' == 'maccatalyst'">
src/libraries/sendtohelixhelp.proj:    <EnableXHarnessTelemetry Condition="'$(TargetOS)' == 'browser' or '$(TargetOS)' == 'wasi'">false</EnableXHarnessTelemetry>
src/libraries/sendtohelixhelp.proj:    <TestEnvFileName Condition=" '$(Scenario)' != '' and '$(TargetOS)' != 'windows' and '$(TargetOS)' != 'browser' and '$(TargetOS)' != 'wasi'">SetStressModes_$(Scenario).sh</TestEnvFileName>

[radekdoulik]

/azp run runtime-wasm

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[radekdoulik]

Build browser-wasm linux Release LibraryTests_Threading_Smoke is #97546