refactor so txm owns blockhash assignment

[Farber98]

Description

Part 1:

• moved blockhash assignment from transmitter and chain to txm. Needed to track expiration in Part 2.
• reduce sendWithRetry complexity by dividing logic into smaller helper funcs. It was really hard to follow and had a lot of responsibilities.

Part 2:

• Create a loop that, every TxExpirationTimeout, retrieves the slotHeight and checks if txes in our broadcastedMap that are in a broadcasted state have expired.
• We do this by adding lastValidBlockHeight to the pendingTx when we create it. This allows us to compare the slotHeight to see if it has exceeded that value and decide if we need to rebuild and rebroadcast the transaction.
• To achieve this, we will need to move the blockhash assignment logic to the sendWithRetry function.
• If we need to rebroadcast a transaction, we should:
  • remove previous one by calling the Remove()
  • build the new transaction and call sendWithRetry with it

https://smartcontract-it.atlassian.net/browse/NONEVM-706

[cl-sonarqube-production]

Quality Gate passed

Issues
0 New issues
1 Fixed issue
0 Accepted issues

Measures
0 Security Hotspots
87.2% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube

[Farber98]

until this point, only refactor of existing logic:

• moved blockhash assignment to txm
• reduce sendWithRetry complexity making it simpler/clearer