[Cashtab] [chronik tx history p18] remove legacy tokenTx param

Summary:
T2447

Depends on D12146

Remove legacy tokenTx param and replace with new isEtokenTx

Test Plan:
Review unit test mods and npm test
npm start and confirm that sent/received etoken txs are still correctly rendered

Reviewers: #bitcoin_abc, emack

Reviewed By: #bitcoin_abc, emack

Differential Revision: https://reviews.bitcoinabc.org/D12147