Improve diagnostics for "not yet supported in inline"

- Tell user what exactly is not supported (e.g., local inline function)
- Reduce diagnostics range to a keyword or an identifier
  where appropriate

 #KT-16223 Fixed Target versions 1.1.50

compiler/testData/diagnostics/tests/controlFlowAnalysis/kt10823.kt

@@ -17,9 +17,9 @@ fun find(): Any? {
 }
 
 fun find4(): Any? {
-    <!NOT_YET_SUPPORTED_IN_INLINE!>inline fun visit(element: Any) {
+    <!NOT_YET_SUPPORTED_IN_INLINE!>inline<!> fun visit(element: Any) {
         <!RETURN_NOT_ALLOWED!>return@find4<!> element
-    }<!>
+    }
     return null
 }