fix: event-replay block parsing outdated and incorrect

[zone117x]

The event-replay logic was using a copy&pasted function for parsing /new_block data, which had become outdated and incorrect.

This removes the duplicated code, and both event-replay and regular block ingestion use the same (correct) block parsing code.

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 96.96970% with 2 lines in your changes missing coverage. Please review.	Files with missing lines	Patch %	Lines
...play/parquet-based/importers/new-block-importer.ts	0.00%	1 Missing :warning:
src/event-stream/event-server.ts	98.46%	1 Missing :warning:

:loudspeaker: Thoughts on this report? Let us know!

[github-actions[bot]]

Vercel deployment URL: https://stacks-blockchain-hvppvv6qd-hirosystems.vercel.app :rocket:

[blockstack-devops]

:tada: This PR is included in version 8.2.0-beta.1 :tada:

The release is available on:

• npm package (@beta dist-tag)
• GitHub release

Your semantic-release bot :package::rocket:

[blockstack-devops]

:tada: This PR is included in version 8.2.0 :tada:

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot :package::rocket: