Disable some tests in WasmGC

They make use of primitive Array coercion, which the WasmGC backend
doesn't support yet

Author: patrick96

web-image/src/com.oracle.svm.hosted.webimage.test/src/com/oracle/svm/hosted/webimage/test/spec/JS_JTT_JSAnnotation.java

@@ -142,6 +142,8 @@ public void jsNumberTest() {
 
     @Test
     public void jsStringTest() {
+        // TODO GR-60603 Enable once JS annotation is supported in WasmGC
+        Assume.assumeFalse(WebImageTestOptions.isWasmGCBackend());
         testFileAgainstNoBuild(JSStringTest.class.getName());
     }
 
@@ -152,6 +154,8 @@ public void jsSymbolTest() {
 
     @Test
     public void jsObjectTest() {
+        // TODO GR-60603 Enable once JS annotation is supported in WasmGC
+        Assume.assumeFalse(WebImageTestOptions.isWasmGCBackend());
         testFileAgainstNoBuild(JSObjectTest.class.getName());
     }
 }