Fix manual job trace polling

What does this MR do?

This MR ensures manual jobs don't poll for a trace until they are started. This is the case right now but not on a visibility change. This MR also calls fetchTrace on a trigger manual job action to ensure the job trace is shown to the user as soon as possible.

Related to (polling fix): #292718 (closed)

Related to (job trace fix): #292814 (closed)

Screenshots (strongly suggested)

Before

Job trace isn't called immediately and refresh is needed manual-trace-bug

After

Job trace is called immediately and trace is shown to user asap. manual-job-trace-fixed

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
• 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