feat: Measure WAL and snapshot transfer speed

[as51340]

Measure WAL and snapshot transfer speed. The intention is to measure if there is any drop in performance when using TLS sockets.

[as51340]

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Standard development

• Update unit/E2E tests
• Compare the benchmarking results between the master branch this branch

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  • Users can now observe the WAL and snapshot transfer speed from the main's side. Metrics include the time needed for replicas to load durability files. #4183
  • What has changed? What does it mean for a user? What should a user do with it? [#{{PR_number}}]({{link to the PR}})
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[sonarqubecloud]

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[colinbarry]

Nice job - really easy to read code. 💪

I've left some notes on a few things, but nothing that should stop merge.