Bind to full prop namings in API v2 endpoints

[vbaranov]

Backend task blockscout/blockscout#10913

Starting from 6.9.0 of backend, all API v2 endpoints contains duplicates of shorthands of the props.

The general idea is to replace:

• ...tx... and ...txn... with ...transaction...
• ...num... with number.

The full set of renamings:

old prop name	new prop name	status
tx_hash	transaction_hash	✅
tx_number	transaction_number	prop is not used
creation_tx_hash	creation_transaction_hash	✅
tx_count	transaction_count	✅
tx_fees	transaction_fees	✅
tx_commitment	transaction_commitment	prop is not used
l1_tx_hashes	l1_transaction_hashes	✅
l1_tx_hash	l1_transaction_hash	✅
l1_tx_count	l1_transaction_count	✅
l1_tx_origin	l1_transaction_origin	✅
l2_tx_hash	l2_transaction_hash	✅
l2_tx_count	l2_transaction_count	✅
l2_tx_gas_limit	l2_transaction_gas_limit	✅
verify_tx_hash	verify_transaction_hash	✅
sequence_tx_hash	sequence_transaction_hash	✅
personal_tx_tag	personal_transaction_tag	prop is not used
block_num	block_number	prop is not used

Please bind to new props in API endpoints. The next (7.0.0) release of the backend will remove old prop names.