Adapt the way we query the last internal transactions for an address

[Viterbo]

Description

Currently, we fetch transactions one by one to get the last 20 internal transactions. This should be changed to query just one bulk list of the last internal transactions for an address.

Update:
This issue depends on https://github.com/telosnetwork/teloscan-indexer/issues/280

Uptade:

route will be /v1/address/{address}/internal?key=<determines-offset>

[Viterbo]

we need to change the strategy on the query offset to what we use on the transaction page (using a p for the page and a key parameter on the query).