add support for empty SSL mode; change needed to connect with Google …

[jjdaurora]

Closes FIDES-1969

Description Of Changes
Write some things here about the changes and any potential caveats

Code Changes

• Update the get_connect_args method in mysql_connector.py to allow for setting an empty connect_args parameter before it gets passed in to the create_engine method

• Update MySQLSchema schema in connection_secrets_mysql.py to allow for saving an empty SSL Mode; add none="" enum

Steps to Confirm

• Create a system and connect to any MySQL connection
• Leave the SSL Mode empty and save the conncetion. The save should be successful without entering an SSL mode.
• Click Test Integration. This step should also be successful, assuming the MySQL instance doesn't require SSL mode. In particular, this will work for a Google Cloud Proxy connection to MySQL.

Pre-Merge Checklist

• Issue requirements met
• All CI pipelines succeeded
• CHANGELOG.md updated
  • Add a db-migration This indicates that a change includes a database migration label to the entry if your change includes a DB migration
  • Add a high-risk This issue suggests changes that have a high-probability of breaking existing code label to the entry if your change includes a high-risk change (i.e. potential for performance impact or unexpected regression) that should be flagged
  • Updates unreleased work already in Changelog, no new entry necessary
• Followup issues:
  • Followup issues created
  • No followup issues
• Database migrations:
  • Ensure that your downrev is up to date with the latest revision on main
  • Ensure that your downgrade() migration is correct and works
    • If a downgrade migration is not possible for this change, please call this out in the PR description!
  • No migrations
• Documentation:
  • Documentation complete, PR opened in fidesdocs
  • Documentation issue created in fidesdocs
  • If there are any new client scopes created as part of the pull request, remember to update public-facing documentation that references our scope registry
  • No documentation updates required

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.88%. Comparing base (712e189) to head (1d6c0a2).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6123      +/-   ##
==========================================
- Coverage   86.88%   86.88%   -0.01%     
==========================================
  Files         423      423              
  Lines       26109    26113       +4     
  Branches     2837     2838       +1     
==========================================
+ Hits        22685    22688       +3     
  Misses       2807     2807              
- Partials      617      618       +1     

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[cypress]

fides    Run #12902

Run Properties:   Passed #12902  •  a9d29ae507: Add support for empty SSL mode; change needed to connect with Google … (#6123)

Project	fides
Branch Review	main
Run status	Passed #12902
Run duration	00m 52s
Commit	a9d29ae507: Add support for empty SSL mode; change needed to connect with Google … (#6123)
Committer	JJ D'Aurora
View all properties for this run ↗︎

---

Test results
Failures	0
Flaky	0
Pending	0
Skipped	0
Passing	5
View all changes introduced in this branch ↗︎