Add e2e tests for empty state of License Compliance and Dependency List

What does this MR do?

As per gitlab-org/quality/testcases#1128 (closed)

Adds End to End tests to test the empty states of License Compliance and Dependency List.

Also refactors the specs it touches.

Screenshots (strongly suggested)

Does this MR meet the acceptance criteria?

Conformity

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• Documentation (if required)
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• 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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• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
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