ref(dashboards): Move widget type to parameter when adding to dashboard

[narsaynorath]

This modal is coupled strongly with discover saved queries. Moving this up to a param so I could integrate it properly with Explore

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

:white_check_mark: All tests successful. No failed tests found.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #81068 +/- ## ======================================= Coverage 78.49% 78.49% ======================================= Files 7209 7210 +1 Lines 319567 319615 +48 Branches 44002 44007 +5 ======================================= + Hits 250832 250877 +45 - Misses 62349 62352 +3 Partials 6386 6386 ```