[FIR] Relax MULTIPLE_DEFAULTS_* to account for the K1 behavior

^KT-56442
^KT-36188

compiler/testData/diagnostics/tests/moreThanOneOverriddenMissingK2.kt

@@ -0,0 +1,19 @@
+// FIR_IDENTICAL
+// ISSUE: KT-57076
+// WITH_STDLIB
+
+interface I01 {
+    fun some(x: Int = 1, y: Int)
+}
+
+open class C01 {
+    open fun some(x: Int = -1, y: Int = 2) {
+        println("x = $x y = $y")
+    }
+}
+
+<!MULTIPLE_DEFAULTS_INHERITED_FROM_SUPERTYPES_WHEN_NO_EXPLICIT_OVERRIDE!>class C02<!>: C01(), I01
+
+fun main(){
+    C02().some() // K2: x = -1 y = 2
+}