Add jobs table empty state component

What does this MR do?

Adds empty state component and empty text prop for the jobs table to Vue/Graphql refactor.

Behind jobs_table_vue feature flag.

Related to: #328810 (closed)

Screenshots (strongly suggested)

If a user has no CI or jobs yet and visit the jobs page.

flag off	flag_on

If a user has CI and jobs but none on a certain tab scope.

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 behind a disabled feature flag.
• 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

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• 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

Related to #328810 (closed)