Enable extraction of constant tie-off values from ConnectionExtractor

[mkorbel1]

Description & Motivation

In addition to determining connections to other modules, ConnectionExtractor can now also find when ports are tied to constant values.

Also, added a flag so that you can extract all port connections as ad-hoc, ignoring full interface connections, which can be useful for parsing purposes.

This PR also adjusts the tie-off APIs so that they can support fill arguments and to have named arguments for the values (breaking!).

Related Issue(s)

N/A

Testing

Added new tests

Backwards-compatibility

Is this a breaking change that will not be backwards-compatible? If yes, how so?

Yes, the API for tieOff and tieOffInterface have changed in a backwards incompatible way: the value argument is now a named optional argument instead of positional.

Not for const extraction, though new connection types will show up

Documentation

Does the change require any updates to documentation? If so, where? Are they included?

No