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/inline/nonPublicMember/localClass2.kt

@@ -6,8 +6,8 @@ public fun test() {
         }
     }
 
-    <!NOT_YET_SUPPORTED_IN_INLINE!>inline fun localFun2() {
+    <!NOT_YET_SUPPORTED_IN_INLINE!>inline<!> fun localFun2() {
         Z().localFun()
-    }<!>
+    }
 
 }