Support for querying combination of "LIKE" and "IN".

Is your feature request related to a problem?

We currently cannot filter by wildcards when using dashboard variables dropdowns.

Imagine dropdown variable $Class with following values:

• A::A
• A::B
• B::A

And the query is "class IN $Class".

In the dashboard variable dropdown, we type "A::*" and press enter, but nothing will show, because the query "IN" only matches full values.

IF we change the query to "class LIKE $CLASS", "A::*" works, but only for single value, so selecting multiple from the dropdown doesn't work.

Of course, the above example is simplified, in reality, we have 100s of options, under dozens of different namespaces.

Describe the solution you'd like

Something like a combined "class LIKE IN $Class", that allows multiple values, and those values can contain wildcards.

Describe alternatives you've considered

None that I can find in current system. It supports either single value with wildcard, or multiple values without.