Output run time per stream

[eliziario]

What

Fixes #7965

How

An EventTimer class is introduced along with a context manager. Due to the possibility that streams could be run in parallell in the future, care has been taken to ensure EventTimer is thread safe

Recommended reading order

1. abstract_source.py
2. event_timing.py

🚨 User Impact 🚨

Connectors need to rebuilt for change to be reflected

Pre-merge Checklist

Expand the relevant checklist and delete the others.

New Connector

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• Code reviews completed
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Updating a connector

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• Unit & integration tests added and passing. Community members, please provide proof of success locally e.g: screenshot or copy-paste unit, integration, and acceptance test output. To run acceptance tests for a Python connector, follow instructions in the README. For java connectors run ./gradlew :airbyte-integrations:connectors:<name>:integrationTest.
• Code reviews completed
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  • Connector's README.md
  • Connector's bootstrap.md. See description and examples
  • Changelog updated in docs/integrations/<source or destination>/<name>.md including changelog. See changelog example
• PR name follows PR naming conventions

Airbyter

If this is a community PR, the Airbyte engineer reviewing this PR is responsible for the below items.

• Create a non-forked branch based on this PR and test the below items on it
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• /test connector=connectors/<name> command is passing.
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• Seed specs have been re-generated by building the platform and committing the changes to the seed spec files, as described here

Connector Generator

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• Documentation which references the generator is updated as needed.