[FIR-TEST] Update testdata

compiler/testData/codegen/box/increment/postfixIncrementOnClass.kt

@@ -1,3 +1,5 @@
+// IGNORE_BACKEND_FIR: JVM_IR
+
 interface Base
 class Derived: Base
 class Another: Base

compiler/testData/codegen/box/increment/prefixIncrementOnClass.kt

@@ -1,4 +1,3 @@
-// IGNORE_BACKEND_FIR: JVM_IR
 interface Base
 class Derived: Base
 class Another: Base

compiler/testData/codegen/box/regressions/kt18779.kt

@@ -1,3 +1,5 @@
+// IGNORE_BACKEND_FIR: JVM_IR
+
 sealed class Result {
     class Failure(val exception: Exception) : Result()
     class Success(val message: String) : Result()

compiler/testData/diagnostics/tests/j+k/polymorphicSignature/spreadOperator_after.fir.kt

@@ -5,7 +5,7 @@ import java.lang.invoke.MethodHandle
 
 fun test(mh: MethodHandle) {
     mh.invokeExact("1", "2")
-    mh.invokeExact(*emptyArray(), "X")
+    mh.<!INAPPLICABLE_CANDIDATE!>invokeExact<!>(*emptyArray(), "X")
-    mh.invokeExact(*arrayOf("A", "B"), "C", *arrayOf("D", "E"))
+    mh.<!INAPPLICABLE_CANDIDATE!>invokeExact<!>(*arrayOf("A", "B"), "C", *arrayOf("D", "E"))
     mh.invoke(*arrayOf("A"))
 }