Milestone 2: Create widgets from explore

[narsaynorath]

The user should be able to use Explore to start adding a widget to the dashboard. This is likely going to follow similar UI as in Discover.

Tasks

• Add a button to "Add to Dashboard"
• Explore widgets should allow you to "Open in Explore" for further investigation

[getsantry]

Routing to @getsentry/product-owners-dashboards for triage ⏲️

[narsaynorath]

Marking the last task as done with the introduction of: #81151

It doesn't fully support group by, but because we're working on the widget redesign we're focusing on supporting that there