[backport#15497] Use stop/[start,stop] notation in importmulti desc range

Summary:
https://github.com/bitcoin/bitcoin/pull/15497/commits/1675b7ce5559d4796c81cb18a522d242be34d996

Depends on D6612

Partial backport of Core PR15497

Test Plan:

ninja check
test_runner.py wallet_importmulti

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Subscribers: Fabien

Differential Revision: https://reviews.bitcoinabc.org/D6613