TECH-631: Atomic C-Chain txs on the cblocks query

[charalarg]

Description

This PR adds the atomic c-chain txs on the c-blocks query response in order to be visible in the block explorer's c-chain view.
These txs are also taken into account by the aggregation calculations.

Changes

• Updated indexes and fields of cvm_transactions_atomic table, in order to be consistent with the cvm_transactions_txdata table.
• Changed the way that the atomic txs are being indexed in order to contain all the appropriate data.
• Implemented the c-blocks query in a way that it also contains the atomic-txs.
• Updated the aggregation calculations in order to take in to consideration the atomic-txs, too.

Example

Block explorer showing an import tx:

Remarks

By clicking the txID or the avax address (From or To address, depends on if the tx is an import or an export ones) of this tx,
we reach empty tables. For the time being these fields could become unclickable from the block explorer because this functionality is out of scope for this PR and needs further refinement.