Update query editor to use new form components

[marcusolsson]

This PR removes the legacy form components in favor of the inline field components. For more information: https://developers.grafana.com/ui/latest/index.html?path=/story/forms-inlinefieldrow--single

It also changes from multiple Select component to a single MultiSelect component.

Feel free to pick any of the changes (if any). If you'd like to keep the previous one-Select-per-row, I recommend that you use non-primary colors. Here's an example for inspiration: https://github.com/marcusolsson/grafana-csv-datasource/blob/6acc1429a79cd681259cf56f1bc64d7f76a5bfc0/src/SchemaEditor.tsx#L64-L69

[Kkoile]

Thanks for opening this pull request! Unfortunately, I can't get it running. I always receive the following error message:
https://reactjs.org/docs/error-decoder.html/?invariant=130&args[]=undefined&args[]=
I tried a lot of things to get around this error, but can't even find the origin.

Do you know where this error comes from? Did you perhaps forgot to commit another file?

[marcusolsson]

Sorry, my bad. The new form components require >=7.3.0. I'll let you decide whether to use the new form components, or to stay compatible with versions <7.3.0

[Kkoile]

It is working now. Thanks for contributing and removing the legacy ui components