[FIR] Add NO_RETURN_IN_FUNCTION_WITH_BLOCK_BODY diagnostic

compiler/testData/diagnostics/tests/incompleteCode/SupertypeOfErrorType.fir.kt

@@ -21,4 +21,4 @@ fun bar(i: Int, a: <!UNRESOLVED_REFERENCE!>U<!>) {
 }
 
 //from standard library
-public inline fun <T> comparator(fn: (T,T) -> Int): Comparator<T> {}
+public inline fun <T> comparator(fn: (T,T) -> Int): Comparator<T> {<!NO_RETURN_IN_FUNCTION_WITH_BLOCK_BODY!>}<!>

compiler/testData/diagnostics/tests/incompleteCode/checkNothingIsSubtype.fir.kt

@@ -3,7 +3,7 @@ package d
 
 interface A<T>
 
-fun <T> infer(a: A<T>) : T {}
+fun <T> infer(a: A<T>) : T {<!NO_RETURN_IN_FUNCTION_WITH_BLOCK_BODY!>}<!>
 
 fun test(nothing: Nothing?) {
     val i = infer(<!ARGUMENT_TYPE_MISMATCH!>nothing<!>)
@@ -12,4 +12,4 @@ fun test(nothing: Nothing?) {
 fun sum(a : IntArray) : Int {
 for (n
 <!SYNTAX!>return<!><!SYNTAX!><!> "?"
-}
+<!NO_RETURN_IN_FUNCTION_WITH_BLOCK_BODY!>}<!>

compiler/testData/diagnostics/tests/incompleteCode/incompleteAssignment.fir.kt

@@ -1,3 +1,5 @@
+// COMPARE_WITH_LIGHT_TREE
+
 package sum
 
 import java.util.*
@@ -6,7 +8,7 @@ fun sum(a : IntArray) : Int {
     <!UNRESOLVED_REFERENCE!>res<!> = 0
     for (e in a)
         <!UNRESOLVED_REFERENCE, VARIABLE_EXPECTED!>res<!> +=<!SYNTAX!><!>
-}
+<!NO_RETURN_IN_FUNCTION_WITH_BLOCK_BODY{LT}!>}<!>
 fun main() {
     test(0)
     test(1, 1)
@@ -27,4 +29,4 @@ fun <T: Any> assertEquals(actual : T?, expected : T?, message : Any? = null) {
         else
             throw AssertionError(message)
     }
-}
+}

compiler/testData/diagnostics/tests/incompleteCode/incompleteAssignment.kt

@@ -1,3 +1,5 @@
+// COMPARE_WITH_LIGHT_TREE
+
 package sum
 
 import java.util.*