Convert has-tooltip on commit page to pajamas

What does this MR do?

• converts comment button on commits to pajamas design
• fixes the tooltip properly hiding issue.

How to test locally(gdk)

• Go to any commit
• Make a comment
• refresh the page and button should show as in the screenshots

Screenshots (strongly suggested)

Before (tooltip will not vanish after navigating away unless page is reloaded)

Screen_Recording_2021-03-30_at_12.39.46_PM

After

Screen_Recording_2021-03-30_at_2.41.36_PM

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 _____.
• 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 #324803