wallet: Postpone wallet loading notification for encrypted wallets
Summary:
CWallet::Create() notifies about wallet loading too early, that results the notification goes before DescriptorScriptPubKeyMans were created and added to an encrypted wallet.
Backport of core#24711.
Depends on D17980.
Test Plan:
ninja all check-all
Reviewers: #bitcoin_abc, PiRK
Reviewed By: #bitcoin_abc, PiRK
Differential Revision: https://reviews.bitcoinabc.org/D17981