[release/6.0][wasm] Backport skipping System.Text.Json tests for aot configuration

Partial backport of dotnet#65413

dotnet#61524 - OOM while linking `System.Text.Json.Tests`

Author: Steve Pfister

src/libraries/tests.proj

@@ -23,6 +23,9 @@
     <!-- Exceeds VM resources in CI on compilation: https://github.com/dotnet/runtime/issues/51961 -->
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)Microsoft.Extensions.Logging.Abstractions\tests\Microsoft.Extensions.Logging.Generators.Tests\Microsoft.Extensions.Logging.Generators.Roslyn3.11.Tests.csproj" />
     <ProjectExclusions Include="$(MSBuildThisFileDirectory)Microsoft.Extensions.Logging.Abstractions\tests\Microsoft.Extensions.Logging.Generators.Tests\Microsoft.Extensions.Logging.Generators.Roslyn4.0.Tests.csproj" />
+  
+    <!-- https://github.com/dotnet/runtime/issues/61524 - OOM while linking -->
+    <ProjectExclusions Include="$(MSBuildThisFileDirectory)System.Text.Json\tests\System.Text.Json.Tests\System.Text.Json.Tests.csproj" />
   </ItemGroup>
 
   <!-- Projects that don't support code coverage measurement. -->