[Enhancement]: Improve Regrid2 performance

[jasonb5]

Is your feature request related to a problem?

Slow performance in Regrid2

Describe the solution you'd like

The #752 PR added support for Regrid2 to output weights as a sparse array. The regridder should utilize weights stored in this format. I'm proposing the following changes:

• Create weights directly into sparse array
• Update the algorithm to utilize apply_ufunc and the sparse array weights

The end goal should be an improvement to the Regrid2 performance.

Describe alternatives you've considered

No response

Additional context

No response