FIR: introduce FunInterfaceDeclarationChecker

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

@@ -0,0 +1,38 @@
+<!FUN_INTERFACE_WRONG_COUNT_OF_ABSTRACT_MEMBERS!>fun<!> interface Test1{
+    fun foo()
+    fun boo()
+}
+<!FUN_INTERFACE_WRONG_COUNT_OF_ABSTRACT_MEMBERS!>fun<!> interface Test2 {}
+fun interface Test3 {
+    <!FUN_INTERFACE_CANNOT_HAVE_ABSTRACT_PROPERTIES!>val<!> a: Int
+    fun foo()
+}
+fun interface Test4{
+    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 Test7{
+    fun foo()
+}
+<!FUN_INTERFACE_WRONG_COUNT_OF_ABSTRACT_MEMBERS!>fun<!> interface Test8: Test7{
+    fun boo()
+}
+interface Test9 {
+    fun num(m: Int): Int {
+        return m * m
+    }
+}
+fun interface Test10 : Test9 {
+    fun test()
+}
+interface Test11 {
+    val a: Int
+}
+<!FUN_INTERFACE_CANNOT_HAVE_ABSTRACT_PROPERTIES!>fun<!> interface Test12 : Test11 {
+    fun test()
+}