test: refactor RPCPackagesTest to use MiniWallet

Summary:

This PR refactors RPCPackagesTest to use MiniWallet and removes create_child_with_parents, make_chain, and create_raw_chain from test_framework/wallet

Backport of core#25522, core#25379 and core#25986.

Because of the removal of create_raw_chain, the abc_mempool_chainedtx test is also converted to Miniwallet.

Test Plan:

ninja check-functional-extended

Reviewers: #bitcoin_abc, PiRK

Reviewed By: #bitcoin_abc, PiRK

Differential Revision: https://reviews.bitcoinabc.org/D16424