[FIR-TEST] Add new testdata generated after changes in previous commit

compiler/testData/diagnostics/tests/java8Overrides/implementingMethodOfAny.fir.kt

@@ -0,0 +1,9 @@
+interface IA {
+    override fun toString(): String = "IA"
+
+    override fun equals(other: Any?): Boolean = super.equals(other)
+
+    override fun hashCode(): Int {
+        return 42;
+    }
+}