Add new component for log control buttons

What does this MR do?

This MR splits a component in 2 to keep component responsibilities separate. This refactor will help us get a more to a more extendable logs page.

⚠ Enable: environment_logs_use_vue_ui to see this UI in action.

Screenshots

No changes in UI.

Visually, components are split like this:

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• [-] 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

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

Closes #5696 (closed)