Broadcast best persistent txs instead of random

[marcindsobczak]

Changes:

• pick and broadcast declared percent (PeerNotificationThreshold) of best persistent transactions instead of random transactions
• broadcast persistent transactions only when their MaxFeePerGas >= CurrentBaseFee
• remove stale transactions from persistent transactions

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Other (please describe):

Testing

Requires testing

• Yes
• No

In case you checked yes, did you write tests??

• Yes
• No