Nudge users to commit their changes

What does this MR do?

Adds the second popver step of the suggest gitlab-ci.yml tour (nudge 3 of pipeline suggest experiment)

Closes gitlab-org/growth/ui-ux#64 (closed)

Screenshots

Uses the same Vue component to display the same popover on a different target element at different times. They wouldn't both be on the page at the same time. nudge 2 closes when a template is selected and applied, and nudge 3 opens, scrolling into view. Tis screenshot demonstrates what they both look like on the same page, nudge2 + nudge3.

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