[FIR] Implement DEFAULT_VALUE_NOT_ALLOWED_IN_OVERRIDE diagnostic

#KT-59409 Fixed

compiler/testData/diagnostics/tests/dataClasses/dataClassExplicitlyOverridingCopyWithDefaults.fir.kt

@@ -5,5 +5,5 @@ interface WithCopy<T> {
 }
 
 data class Test(val str: String) : WithCopy<String> {
-    override fun copy(str: String = this.str) = Test(str)
-}
+    override fun copy(str: String = <!DEFAULT_VALUE_NOT_ALLOWED_IN_OVERRIDE!>this.str<!>) = Test(str)
+}