Rename COMPlus_ to DOTNET_ (#77321)

Author: TIHan

src/tests/JIT/opt/Multiply/IntMultiply.csproj

@@ -11,7 +11,7 @@
       <HasDisasmCheck>true</HasDisasmCheck>
     </Compile>
 
-    <CLRTestEnvironmentVariable Include="COMPlus_TieredCompilation" Value="0" />
-    <CLRTestEnvironmentVariable Include="COMPlus_JITMinOpts" Value="0" />
+    <CLRTestEnvironmentVariable Include="DOTNET_TieredCompilation" Value="0" />
+    <CLRTestEnvironmentVariable Include="DOTNET_JITMinOpts" Value="0" />
   </ItemGroup>
 </Project>