Improve transaction history sync process

[alvarengathomas]

Description

As a user, I want to see my transaction history as soon as possible, so I don't have to wait a long time until the application load all my transactions.

Problem addressed

The sync process takes a long time to load all the transactions because it is reading all blocks in the chain by chunks.

Proposed implementation

An alternative solution to fix this problem is to use Blockscout Explorer API to return all transactions related to the user address.

Reference: https://testnet.explorer.hemi.xyz/api-docs
Endpoint: /addresses/{address_hash}/transactions

[gndelia]

Note that we will need to get transactions for the user from the L1 chains as well