Disable PerfMap generation for Apple mobile platforms (#51545)

Author: kotlarmilos

src/Tasks/Microsoft.NET.Build.Tasks/PrepareForReadyToRunCompilation.cs

@@ -210,7 +210,7 @@ private void ProcessInputFileList(
                     // an input to the ReadyToRunCompiler task
                     TaskItem r2rCompilationEntry = new(file);
                     r2rCompilationEntry.SetMetadata(MetadataKeys.OutputR2RImage, outputR2RImage);
-                    if (outputPDBImage != null && ReadyToRunUseCrossgen2 && !_crossgen2IsVersion5)
+                    if (outputPDBImage != null && ReadyToRunUseCrossgen2 && !_crossgen2IsVersion5 && EmitSymbols)
                     {
                         r2rCompilationEntry.SetMetadata(MetadataKeys.EmitSymbols, "true");
                         r2rCompilationEntry.SetMetadata(MetadataKeys.OutputPDBImage, outputPDBImage);

src/Tasks/Microsoft.NET.Build.Tasks/targets/Microsoft.NET.CrossGen.targets

@@ -24,6 +24,7 @@ Copyright (c) .NET Foundation. All rights reserved.
     <PublishReadyToRunComposite Condition="'$(PublishReadyToRunUseCrossgen2)' != 'true' or '$(SelfContained)' != 'true'">false</PublishReadyToRunComposite>
     <PublishReadyToRunUseRuntimePackOptimizationData Condition="'$(PublishReadyToRunUseRuntimePackOptimizationData)' == ''">true</PublishReadyToRunUseRuntimePackOptimizationData>
     <PublishReadyToRunPerfmapFormatVersion Condition="'$(PublishReadyToRunPerfmapFormatVersion)' == ''">1</PublishReadyToRunPerfmapFormatVersion>
+    <PublishReadyToRunEmitSymbols Condition="'$(PublishReadyToRunEmitSymbols)' == '' and ('$(TargetPlatformIdentifier)' == 'ios' or '$(TargetPlatformIdentifier)' == 'tvos' or '$(TargetPlatformIdentifier)' == 'maccatalyst')">false</PublishReadyToRunEmitSymbols>
   </PropertyGroup>
 
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