DSN migration for pydantic v3

[CherrySuryp]

This PR is related to this task from Pydantic main library.
I moved DSN types and tests from original pydantic/networks.py without any changes

Checklist

✅ The pull request title is a good summary of the changes - it will be used in the changelog
✅ Unit tests for the changes exist

Selected Reviewer: @yezz123

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

📢 Thoughts on this report? Let us know!

[CherrySuryp]

Please review

[CherrySuryp]

Hello there! All checks for Python 3.8 have failed :(
It fell with error:
ImportError: cannot import name 'Annotated' from 'typing' (/opt/hostedtoolcache/Python/3.8.18/x64/lib/python3.8/typing.py).

Seems like Python 3.8 doesn't have Annotated class

[CherrySuryp]

I also think it would make sense to move the entire pydantic/networks.py module to pydantic-extra-types

[yezz123]

Waiting for @sydney-runkle approval and then we can merge it, Overall LGTM 🚀

[CherrySuryp]

@yezz123 @sydney-runkle can we move other stuff from pydantic/networks.py to current libraray? I can do it in this PR

[yezz123]

I will close this one in favor of #368