[Cashtab] [chronik tx history p7] duplicate most legacy tx data

Summary:
T2447

Depends on D12056

Duplicate most data required by Tx.js to render tx history. Put it in a legacy object so it can match rendering.

Test Plan:
Review the updated change (requiring wallet as input to deal with encrypted msgs), it's impact on mocks and tests, and npm test

npm start and check the legacy field of parsedTxs for correct OP_RETURN msg parsing

Reviewers: #bitcoin_abc, emack

Reviewed By: #bitcoin_abc, emack

Differential Revision: https://reviews.bitcoinabc.org/D12066