K2: add ACCIDENTAL_OVERRIDE_CLASH_BY_JVM_SIGNATURE for clashing functions

This diagnostic is reported on an explicitly-declared function which
overrides a regular Java function with the same signature as a hidden
one from the same scope.

#KT-64846 Fixed

compiler/testData/diagnostics/tests/j+k/collectionOverrides/containsAndOverload.fir.kt

@@ -1,5 +1,6 @@
 // !DIAGNOSTICS: -UNUSED_PARAMETER -UNUSED_VARIABLE -PARAMETER_NAME_CHANGED_ON_OVERRIDE
 // SCOPE_DUMP: KA:contains
+// RENDER_DIAGNOSTICS_FULL_TEXT
 
 // FILE: A.java
 abstract public class A implements java.util.Collection<String> {
@@ -9,7 +10,7 @@ abstract public class A implements java.util.Collection<String> {
 
 // FILE: main.kt
 abstract class KA : A() {
-    override fun contains(x: String) = false
+    override fun <!ACCIDENTAL_OVERRIDE_CLASH_BY_JVM_SIGNATURE!>contains<!>(x: String) = false
 }
 
 fun foo(a: A, ka: KA) {