FunctionAnnotationAction: improvements for top-level tuple patterns

[DedSec256]

Fix for RIDER-119806

It is also consistent with parameter info (and xml docs) now

[auduchinok]

@DedSec256 Could you also check if active patterns work good in this action?

Consider this case with f : string -> unit and (|TryParseBool|_|) : string -> bool option:

let f (TryParseBool enabled) = ()

What would get annotated? I'd probably expect it to annotate the outer string pattern.

[DedSec256]

@auduchinok, it works as expected. I will add a test.