[packages] add static IsChildWithParents function

Summary:
This is a partial backport of core#22674
https://github.com/bitcoin/bitcoin/pull/22674/commits/9b2fdca7f03911ac40fe0f8a0b5da534bee4554b
https://github.com/bitcoin/bitcoin/pull/22674/commits/ba26169f6035c238378a3c9647213328a006fa23

Test Plan: ninja && ninja check`

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Subscribers: Fabien

Differential Revision: https://reviews.bitcoinabc.org/D12474