LibWeb/WebGL2: Implement MAX_ARRAY_TEXTURE_LAYERS parameter

Meta/Lagom/Tools/CodeGenerators/LibWeb/GenerateWebGLRenderingContext.cpp

@@ -171,6 +171,7 @@ static void generate_get_parameter(SourceGenerator& generator, int webgl_version
         { "VIEWPORT"sv, { "Int32Array"sv, 4 } },
         { "MAX_SAMPLES"sv, { "GLint"sv }, 2 },
         { "MAX_3D_TEXTURE_SIZE"sv, { "GLint"sv }, 2 },
+        { "MAX_ARRAY_TEXTURE_LAYERS"sv, { "GLint"sv }, 2 },
     };
 
     auto is_primitive_type = [](StringView type) {