[inspection] IDEA-257415 Warnings for value-based classes (Java 16)

This patch adds the inspection to detect usages of value-based classes' instances as monitors in the synchronize statement.

Signed-off-by: Nikita Eshkeev <nikita.eshkeev@jetbrains.com>

GitOrigin-RevId: 178533c1415b2a8f11d48db17c19baa7e6ff4d1a

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/valuebased/ComplexValueBasedHierarchy.java

@@ -0,0 +1,28 @@
+import valuebased.classes.OpenValueBased;
+class One extends OpenValueBased { }
+class Two extends One { }
+class Three extends Two { }
+class ComplexVBHierarchy extends Three { }
+
+class Main {
+  final ComplexVBHierarchy vb = new ComplexVBHierarchy();
+  {
+    final ComplexVBHierarchy localVb = new ComplexVBHierarchy();
+    final Object objectVb = new ComplexVBHierarchy();
+
+    synchronized (<warning descr="Attempt to synchronize on an instance of a value-based class">vb</warning>) {}
+    synchronized (<warning descr="Attempt to synchronize on an instance of a value-based class">localVb</warning>) {}
+    synchronized (<warning descr="Attempt to synchronize on an instance of a value-based class">objectVb</warning>) {}
+    synchronized (ComplexVBHierarchy.class) {}
+    f(vb);
+    g(vb);
+  }
+
+  void f(ComplexVBHierarchy vb) {
+    synchronized (<warning descr="Attempt to synchronize on an instance of a value-based class">vb</warning>) {}
+  }
+
+  void g(Object vb) {
+    synchronized (vb) {}
+  }
+}