Enable sourcelink in source-build (#76685)

* Do not disable sourcelink in source-build

* Verify sourcelink file during source-build

* Enable sourcelink in SourceBuild by default

* Native sourcelink file is only used on Windows

Author: NikolaMilosavljevic

eng/SourceBuild.props

@@ -40,6 +40,7 @@
       <InnerBuildArgs>$(InnerBuildArgs) /p:BuildDebPackage=false</InnerBuildArgs>
       <InnerBuildArgs>$(InnerBuildArgs) /p:EnableNgenOptimization=false</InnerBuildArgs>
       <InnerBuildArgs>$(InnerBuildArgs) /p:EnablePackageValidation=false</InnerBuildArgs>
+      <InnerBuildArgs>$(InnerBuildArgs) /p:DisableSourceLink=false</InnerBuildArgs>
     </PropertyGroup>
   </Target>
 

src/coreclr/runtime-prereqs.proj

@@ -6,6 +6,7 @@
     <RuntimeVersionFile>$(ArtifactsObjDir)runtime_version.h</RuntimeVersionFile>
     <NativeSourceLinkFile>$(ArtifactsObjDir)native.sourcelink.json</NativeSourceLinkFile>
     <VerifySourceLinkFileExists>false</VerifySourceLinkFileExists>
+    <!-- Native sourcelink file is used only by Windows build - SourceBuild should ignore its existence. -->
     <VerifySourceLinkFileExists Condition="'$(ContinuousIntegrationBuild)' == 'true' and '$(DotNetBuildFromSource)' != 'true'">true</VerifySourceLinkFileExists>
     <AssemblyName>.NET Runtime</AssemblyName>
   </PropertyGroup>