Allow enabling/disabling multiselect in data grid

[mhwaage]

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

Currently, the data grid allows multi-selecting rows. I would like this to be configurable. This is configurable in the underlying tanstack table, so this is a matter of forwarding props.

Describe the solution you'd like
A forwarded prop for enabling (or not) multi-select (currently it is using the default, which is that it is enabled if row selection is enabled).

Describe alternatives you've considered

Users somehow manage this via the onRowSelection function. This is surprisingly tricky.
Additional context
I have made a draft pr in #3355 but this one does not contain any tests since I haven't configured the overall environment locally.

[oddvernes]

this was resolved by #3355