Change Details

* Keep full pubkeys in FlatSigningProvider::origins * Import all origin info in importmulti; even for non-importing pubkeys * Take non-importing keys into account for spendability warning in descriptor import This is a backport of Core PR15749

* Keep full pubkeys in FlatSigningProvider::origins * Import all origin info in importmulti; even for non-importing pubkeys * Take non-importing keys into account for spendability warning in descriptor import This is a backport of Core [[https://github.com/bitcoin/bitcoin/pull/15749 | PR15749]]

* Keep full pubkeys in FlatSigningProvider::origins * Import all origin info in importmulti; even for non-importing pubkeys * Take non-importing keys into account for spendability warning in descriptor import This is a backport of Core [[https://github.com/bitcoin/bitcoin/pull/15749 | PR15749]]