[alias-server] match output scripts for p2pkh or p2sh registration address

Summary:
T3060

Depends on D13606

Remove hard-coded outputScript matcher used to parse valid alias txs.

Add unit tested function to get the desired outputScript from address.

Modify calls to functions with modified params.

Test Plan: npm test

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Subscribers: Fabien

Differential Revision: https://reviews.bitcoinabc.org/D13607