[mono][ios] Revert LLVM mode for apple mobile tests (#90586)

* Revert LLVM mode for apple mobile tests

* Add comment

Author: kotlarmilos

eng/testing/tests.ioslike.targets

@@ -15,8 +15,8 @@
 
     <!-- running aot-helix tests locally, so we can test with the same project file as CI -->
     <_AOTBuildCommand Condition="'$(ContinuousIntegrationBuild)' != 'true'">$(_AOTBuildCommand) /p:RuntimeSrcDir=$(RepoRoot) /p:RuntimeConfig=$(Configuration)</_AOTBuildCommand>
-    
-    <_AOTBuildCommand>$(_AOTBuildCommand) /p:XHARNESS_EXECUTION_DIR=&quot;$XHARNESS_EXECUTION_DIR&quot; /p:RunAOTCompilation=$(RunAOTCompilation) /p:UseNativeAOTRuntime=$(UseNativeAOTRuntime) /p:TargetOS=$(TargetOS) /p:TargetArchitecture=$(TargetArchitecture) /p:MonoForceInterpreter=$(MonoForceInterpreter) /p:DevTeamProvisioning=$(DevTeamProvisioning) /p:UsePortableRuntimePack=true /p:Configuration=$(Configuration)</_AOTBuildCommand>
+    <!-- The command below sets default properties for runtime and library tests -->
+    <_AOTBuildCommand>$(_AOTBuildCommand) /p:XHARNESS_EXECUTION_DIR=&quot;$XHARNESS_EXECUTION_DIR&quot; /p:RunAOTCompilation=$(RunAOTCompilation) /p:UseNativeAOTRuntime=$(UseNativeAOTRuntime) /p:TargetOS=$(TargetOS) /p:TargetArchitecture=$(TargetArchitecture) /p:MonoForceInterpreter=$(MonoForceInterpreter) /p:MonoEnableLLVM=true /p:DevTeamProvisioning=$(DevTeamProvisioning) /p:UsePortableRuntimePack=true /p:Configuration=$(Configuration)</_AOTBuildCommand>
     <_AOTBuildCommand>$(_AOTBuildCommand) </_AOTBuildCommand>
 
     <_ResetSimulatorSwitch Condition="'$(TargetOS)' == 'iossimulator' or '$(TargetOS)' == 'tvossimulator'">--reset-simulator</_ResetSimulatorSwitch>