[backport#17304 9/18] Refactor: Move SetAddressBookWithDB call out of LegacyScriptPubKeyMan::ImportScriptPubKeys

Summary:
This commit does not change behavior.

https://github.com/bitcoin/bitcoin/pull/17304/commits/67be6b9e213da1fd7b2e8438c445c5a64092e831

Depends on D7155

Partial backport of Core PR17304

Test Plan:

ninja check

Reviewers: #bitcoin_abc, jasonbcox

Reviewed By: #bitcoin_abc, jasonbcox

Differential Revision: https://reviews.bitcoinabc.org/D7156