moveonly: CoinElegibilityFilter into coinselection.h

Summary: This is a partial backport of Core PR12257 : https://github.com/bitcoin/bitcoin/pull/12257/commits/a443d7a0ca333b0bae63e04b5d476f9ad9c7aeac

Test Plan:

make check

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D3390