KT-10322, KT-10646, KT-10647:

- update diagnostic to (supposedly) more useful
- also report IMPLICIT_CAST_TO_ANY if expected type is DONT_CARE
 (effectively "no expected type" for lambda expression).

compiler/testData/diagnostics/tests/controlStructures/kt10322.txt

@@ -0,0 +1,4 @@
+package
+
+public fun </*0*/ T> run(/*0*/ block: () -> T): T
+public fun test1(): kotlin.Unit