Fixing check-migration command

[galvana]

Purpose

To fix check-migration Make command

Changes

• Importing Fidesops base instead of Fideslib base so the Alembic functions use the correct metadata to compare against the database.

Checklist

• Update CHANGELOG.md file
  • Merge in main so the most recent CHANGELOG.md file is being appended to
  • Add description within the Unreleased section in an appropriate category. Add a new category from the list at the top of the file if the needed one isn't already there.
  • Add a link to this PR at the end of the description with the PR number as the text. example: #1
• The Run Unsafe PR Checks label has been applied, and checks have passed, if this PR touches any external services

Ticket

Fixes #792

[sanders41]

Thanks @galvana! I have tried so many things trying to fix this test, and would never have thought to try this. The failing unsafe check doesn't look to me like it is related to this PR. Do you think it would pass if we restart it?

[galvana]

Hey @sanders41, you're welcome! It looks like the recent failures were caused by some timing issues so we should be good to go!