Consolidate Datafetching Code

[TheJeran]

There's a lot of duplicate code between

Browzarr/src/components/zarr/NCGetters.ts

Line 49 in 72296ae

export async function GetNCArray(variable: string){

and

Browzarr/src/components/zarr/ZarrGetters.ts

Line 127 in 72296ae

export async function GetZarrArray(variable: string){

Would be good to try to consolidate these two.