fix: explore without timeseries has broken measures section

[AdityaHegde]

Explore without timeseries uses a different measure container. All the new updates broke this section.

1. Using the new measures dropdown that supports tags.
2. Fixing the styling below the dropdown, the dropdown was part of grid.
3. Updating to use flex so that measures are filled row by row and wrap if there is no space.
4. Make sure measure/leaderboard resizer works

Checklist:

• Covered by tests
• Ran it and it works as intended
• Reviewed the diff before requesting a review
• Checked for unhandled edge cases
• Linked the issues it closes
• Checked if the docs need to be updated. If so, create a separate Linear DOCS issue
• Intend to cherry-pick into the release branch
• I'm proud of this work!

[nishantmonu51]

👍 , LGTM.