FIR: fix positioning in fun interface checker

compiler/fir/analysis-tests/testData/resolve/funInterfaceDeclaration.kt

@@ -1,3 +1,5 @@
+// !LANGUAGE: -SuspendFunctionsInFunInterfaces
+
 <!FUN_INTERFACE_WRONG_COUNT_OF_ABSTRACT_MEMBERS!>fun<!> interface Test1{
     fun foo()
     fun boo()
@@ -8,13 +10,13 @@ fun interface Test3 {
     fun foo()
 }
 fun interface Test4{
-    fun <<!FUN_INTERFACE_ABSTRACT_METHOD_WITH_TYPE_PARAMETERS!>T<!>> foo(a: T)
+    fun <!FUN_INTERFACE_ABSTRACT_METHOD_WITH_TYPE_PARAMETERS!><T><!> foo(a: T)
 }
 fun interface Test5{
     fun foo(<!FUN_INTERFACE_ABSTRACT_METHOD_WITH_DEFAULT_VALUE!>a: Int = 5<!>)
 }
 fun interface Test6{
-    suspend fun foo()
+    <!FUN_INTERFACE_WITH_SUSPEND_FUNCTION!>suspend<!> fun foo()
 }
 fun interface Test7{
     fun foo()
@@ -36,3 +38,8 @@ interface Test11 {
 <!FUN_INTERFACE_CANNOT_HAVE_ABSTRACT_PROPERTIES!>fun<!> interface Test12 : Test11 {
     fun test()
 }
+interface Test14 {
+    suspend fun test()
+}
+<!FUN_INTERFACE_WITH_SUSPEND_FUNCTION!>fun<!> interface Test15 : Test14
+