This intrinsic was always calling the supplied suspend function
non-virtually, and this was hardcoded in the intrinsic generator.
Now this can be configured with `superQualifierSymbol` in the respective
IrCall, just the way this works with any other calls.
As a side effect, global optimizations now process this intrinsic more
correctly (before that, they didn't take the intrinsic generator into
account, and treated the call as virtual).
Svyatoslav Scherbina
f8462f1b0c