K2: Fix generic inference case with !! synthetic call

Result of the `checkNotNull` calls should always be a non-nullable
values.
The simplest idea how to acheive it is adding not-nullable Any bound
to the type parameter declaration.

Existing comment stating about impossibility of such bound seems to be
not 100% correct because it doesn't take into account presence of
definitely-non-nullable X & Any types that allow described case with
nullable generic.

^KT-55804 Fixed

compiler/testData/diagnostics/tests/collectionLiterals/kt34515.fir.kt

@@ -1,3 +1,3 @@
 fun main() {
-    <!NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER, NEW_INFERENCE_NO_INFORMATION_FOR_PARAMETER!><!UNSUPPORTED!>[]<!><!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>!!<!>
+    <!UNSUPPORTED!>[]<!><!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!><!UNNECESSARY_NOT_NULL_ASSERTION!>!!<!>
 }