run rpc_signrawtransaction with --descriptors

Summary:
This test works without any changes, for Bitcoin ABC.
For Bitcoin Core, there were some changes in segwit related tests.

This is a backport of core#18788 [6/15]

https://github.com/bitcoin/bitcoin/pull/18788/commits/0bd1860300b13b12a25d330ba3a93ff2d13aa379

Test Plan: test/functional/test_runner.py rpc_signrawtransaction

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D10659