FIR: suppress excessive warning on java Class

The root cause is https://youtrack.jetbrains.com/issue/KT-49358 though.
We should undo this change after that issue is fixed.

compiler/testData/diagnostics/tests/when/whenOnClass.kt

@@ -0,0 +1,32 @@
+// FIR_IDENTICAL
+// FULL_JDK
+// WITH_RUNTIME
+// WITH_REFLECT
+
+interface A
+interface B : A
+interface C
+
+fun test1(a: A) {
+    when (a.javaClass) {
+        A::class.java -> {}
+        B::class.java -> {}
+        C::class.java -> {}
+        Any::class.java -> {}
+        else -> {}
+    }
+}
+
+class Foo : B
+class Bar
+
+fun test2(f: Foo) {
+    when (f.javaClass) {
+        Foo::class.java -> {}
+        Bar::class.java -> {}
+        A::class.java -> {}
+        B::class.java -> {}
+        C::class.java -> {}
+        Any::class.java -> {}
+    }
+}

compiler/testData/diagnostics/tests/when/whenOnClass.txt

@@ -0,0 +1,36 @@
+package
+
+public fun test1(/*0*/ a: A): kotlin.Unit
+public fun test2(/*0*/ f: Foo): kotlin.Unit
+
+public interface A {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public interface B : A {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class Bar {
+    public constructor Bar()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public interface C {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public final class Foo : B {
+    public constructor Foo()
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}