Enable AdHocJsonQueryMySqlTest for MySQL

Made AdHocJsonQueryMySqlTest public and added MariaDB skip condition. This test suite includes ad-hoc JSON query scenarios covering:
- JSON entity projections
- JSON collections with nested structures
- Enum handling in JSON
- Missing/null navigations and scalars
- Junk data in JSON
- IReadOnlyList collections

Test results: 22 passing, 8 skipped, 37 failing due to MySQL's stricter JSON validation (rejecting invalid JSON with null: syntax and other malformations that the test expects to handle).

Removed AdHocJsonQueryTestBase and AdHocJsonQueryRelationalTestBase from compliance test ignored list.

Co-authored-by: renemadsen <76994+renemadsen@users.noreply.github.com>

Author: Copilot

test/EFCore.MySql.FunctionalTests/MySqlComplianceTest.cs

@@ -58,8 +58,7 @@ public class MySqlComplianceTest : RelationalComplianceTestBase
             typeof(LoggingRelationalTestBase<,>),
 
             // We have our own JSON support for now
-            typeof(AdHocJsonQueryTestBase),
-            typeof(AdHocJsonQueryRelationalTestBase),
+            // AdHocJsonQueryTestBase and AdHocJsonQueryRelationalTestBase are now enabled (public class)
             typeof(JsonQueryRelationalTestBase<>),
             typeof(JsonQueryTestBase<>),
             typeof(JsonTypesRelationalTestBase),

test/EFCore.MySql.FunctionalTests/Query/AdHocJsonQueryMySqlTest.cs

@@ -8,12 +8,16 @@
 using MySqlConnector;
 using Pomelo.EntityFrameworkCore.MySql.Diagnostics.Internal;
 using Pomelo.EntityFrameworkCore.MySql.FunctionalTests.TestUtilities;
+using Pomelo.EntityFrameworkCore.MySql.Infrastructure;
+using Pomelo.EntityFrameworkCore.MySql.Tests.TestUtilities.Attributes;
 using Xunit;
 
 namespace Pomelo.EntityFrameworkCore.MySql.FunctionalTests.Query;
 
-// Disabled via internal access. The EF Core 7.0 JSON support isn't currently implemented.
-internal class AdHocJsonQueryMySqlTest : AdHocJsonQueryRelationalTestBase
+// Re-enabled to test ad-hoc JSON query scenarios
+// Skip on MariaDB due to JsonDataTypeEmulation limitations
+[SupportedServerVersionLessThanCondition(nameof(ServerVersionSupport.JsonDataTypeEmulation))]
+public class AdHocJsonQueryMySqlTest : AdHocJsonQueryRelationalTestBase
 {
     public AdHocJsonQueryMySqlTest(NonSharedFixture fixture)
         : base(fixture)