Active integrations should be displayed in a separate table

What does this MR do?

Implements #214885 (closed) - split the Integrations table into 2 tables - active and inactive.

We have moved the table from HAML to Vue - this is somewhat of a pre-optimisation that will enable us to do things like filter the table, etc. in the future.

Screenshots (strongly suggested)

Small	Big

Project	Group	Admin

Empty states

No active integrations	Every integration activated

Does this MR meet the acceptance criteria?

Conformity

• 📋 Does this MR need a changelog?
  • I have included a changelog entry.
  • I have not included a changelog entry because _____.
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

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• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team