Implement IsMine for DescriptorScriptPubKeyMan

Summary:
Adds a set of scriptPubKeys that DescriptorScriptPubKeyMan tracks.
If the given script is in that set, it is considered ISMINE_SPENDABLE

Backport of Core PR16528 [11/43] : https://github.com/bitcoin/bitcoin/pull/16528/commits/2db7ca765c8fb2c71dd6f7c4f29ad70e68ff1720

Test Plan:

ninja all check-all

Reviewers: #bitcoin_abc, majcosta

Reviewed By: #bitcoin_abc, majcosta

Differential Revision: https://reviews.bitcoinabc.org/D8409