Add Atlassian Bamboo

Purpose

We are adding Atlassian Bamboo integration logo, as per gitlab#367609 (closed), followed the spreadsheets.

Approval status:

"Approved as long as the use aligns with what's allowed according to their brand guidelines. (No account found on file)"

Screenshots

Checklist

For a new icon and/or illustration:

• Link to related design issue:
• If this adds an icon ensure that it follows the new icon checklists.
• If this adds an illustration ensure that it follows the new illustration checklists.

For third-party trademarks:

• If this adds or updates an icon or illustration that includes a third-party trademark, ensure that it follows the process for adding third-party trademarks to GitLab.