Allow multiplying strings/arrays in `remap` transform

[JeanMertz]

Extracted from #3341 (comment):

Any consideration for String * Integer to produce a repeating string? Similarly, Array * Integer to extend an array?

[binarylogic]

@JeanMertz unless you've already started on this I think we should move this back to the backlog. It's low priority given the other remap work.