Remove dataset dropdown from saas config

[TheAndrewJackson]

Closes #3518

Code Changes

• Remove dataset dropdown from saas
• Add check to unsure dataset patching only happens for databases

Steps to Confirm

• Run fides and admin ui
• create a system and go to integrations tab
• Create a saas connector and check that the dropdown isn't there
• edit the saas connector
• delete the saas connector
• Create a database connector
• Edit it and set the dataset to use the previous saas connectors (you'd never do this normally but it's helpful for this test)

Pre-Merge Checklist

• All CI Pipelines Succeeded
• Documentation:
  • documentation complete, PR opened in fidesdocs
  • documentation issue created in fidesdocs
• Issue Requirements are Met
• Relevant Follow-Up Issues Created
• Update CHANGELOG.md
• For API changes, the Postman collection has been updated

Description Of Changes

[cypress]

Passing run #2762 ↗︎

0	4	0	0	0
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Details:

Merge 11df3cd into 07d5355...
Project: fides	Commit: c5832d2079 ℹ️
Status: Passed	Duration: 00:48 💡
Started: Jun 16, 2023 8:30 PM	Ended: Jun 16, 2023 8:31 PM

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