passing crs to dep_tools.grid._gridspec doesn't work

[jessjaco]

Corner coordinates are hardwired to 3832, and units are expected to be meters.

dep-tools/dep_tools/grids.py

Lines 154 to 165 in c377fe1

	def _gridspec(resolution, crs=PACIFIC_EPSG) -> GridSpec:
	gridspec_origin = XY(-3000000.0, -4000000.0)
	side_in_meters = 96_000
	shape = (side_in_meters / resolution, side_in_meters / resolution)
	return GridSpec(
	crs=crs,
	tile_shape=shape,
	resolution=resolution,
	origin=gridspec_origin,
	)