[Test] Update test according to KT-58899

compiler/testData/diagnostics/tests/multiplatform/headerClass/equalsOverrideInActualInterface.fir.kt

@@ -0,0 +1,7 @@
+// MODULE: m1-common
+<!INCOMPATIBLE_MATCHING{JVM}!>expect interface Base<!>
+
+// MODULE: m1-jvm()()(m1-common)
+actual interface Base {
+    override fun equals(other: Any?): Boolean
+}

compiler/testData/diagnostics/tests/multiplatform/headerClass/equalsOverrideInActualInterface.kt

@@ -1,4 +1,3 @@
-// FIR_IDENTICAL
 // MODULE: m1-common
 expect interface Base