Navigate to group issues page and project issues page from a label

• We want to expose group features more in GitLab. One way to achieve that is to quickly get to the group issues list page from a label.
• The following design applies to labels anywhere in GitLab that are rendered as a label. Refer to mockups:
• In the resting state, it looks like a label as usual.
• On mouse hover, you see the popup tooltip as usual. But now there is an additional chevron.
• If you click the chevron you get several options.
• If it is a group label, the first option allows you to navigate to the group issues list page with that label pre-filled.
• If it is a group label or a project label, there is an option to navigate to the project issues list page with that label pre-filled.
• If the label is in a sidebar (issue page, issue board), there is an option to remove the label. This can be implemented as a separate issue, i.e. https://gitlab.com/gitlab-org/gitlab-ce/issues/33507.
• When you click the label directly (without selecting the dropdown), you should navigate to the group issues page if it's a group label. And you should navigate to the project issues page if it's a project label.

This is the existing design of the pipeline dropdowns. Designs for this issue can be similar.