KT-10646, KT-10647:

Move IMPLICIT_CAST_TO_UNIT_OR_ANY to ControlFlowInformationProvider
(where checks for 'if' and 'when' used as expressions are performed).

compiler/testData/diagnostics/tests/controlStructures/whenInResultOfLambda.kt

@@ -0,0 +1,7 @@
+val test1 = { <!IMPLICIT_CAST_TO_UNIT_OR_ANY!>when (true) { true -> 1; else -> "" }<!> }
+
+val test2 = { { <!IMPLICIT_CAST_TO_UNIT_OR_ANY!>when (true) { true -> 1; else -> "" }<!> } }
+
+val test3: (Boolean) -> Any = { when (true) { true -> 1; else -> "" } }
+
+val test4: (Boolean) -> Any? = { when (true) { true -> 1; else -> "" } }