[FEA] Add RMM support for GPU mem allocation

[cdinea]

Is your feature request related to a problem? Please describe.
A clear and concise description of what the problem is. Ex. I wish I could use cuCIM to do [...]

Describe the solution you'd like
A clear and concise description of what you want to happen.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context, code examples, or references to existing implementations about the feature request here.