Search using multi-select

[adam-wolfe]

Is your feature request related to a problem? Please describe.

In the current search implementation users can only search either individual data sets or all data sets that have been listed under a filter.

Describe the solution you'd like

Allow users to select multiple data sets for searching so that they can search a subset of the listed data sets.

Describe alternatives you've considered

Additional context

[github-actions]

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