🎉 Source Pinterest: Added backoff strategy for rate-limit errors

[lgomezm]

What

• When facing rate limit errors, the Pinterest source connector just logs them.
• Syncs stop after these errors occur.

How

• Retries rate limit errors (by not overriding HttpStream.should_retry method).
• Adds backoff strategy to retry rate limit errors.

I could not find documentation about the actual header to use to get how long it should wait to retry, but could reproduce the rate limit error to verify it:

Recommended reading order

1. source.py
2. test_streams.py

🚨 User Impact 🚨

Are there any breaking changes? What is the end result perceived by the user? If yes, please merge this PR with the 🚨🚨 emoji so changelog authors can further highlight this if needed.

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[bazarnov]

Unit Tests are passed confirmation:

[bazarnov]

/publish connector=connectors/source-pinterest run-tests=false

Publishing without SAT tests, due to run-out Rate Limits for Pinterest Trial Account (our test account).

🕑 Publishing the following connectors:
connectors/source-pinterest
https://github.com/airbytehq/airbyte/actions/runs/3000652582

Connector	Did it publish?	Were definitions generated?
connectors/source-pinterest	✅	✅

if you have connectors that successfully published but failed definition generation, follow step 4 here ▶️

[bazarnov]

@lgomezm
Thank you for your contribution, we've extended of what you've already done and covered with unit_tests!