Add permission check to new GardenAdminCard

[obr42]

Once #185 and #203 have both been merged, call the hasGardenPermission function from #203 in the new GardenAdminCard.tsx file from #185 as follows:

      <CardActions>
        {hasGardenPermission('garden:update') && (
            <Button
              variant="contained"
              color="secondary"
              component={RouterLink}
              to={'/admin/gardens/' + garden.name}
              sx={{ width: 0.75, mr: 1 }}
            >
              Edit configurations
            </Button>
        )}
        {garden.connection_type !== 'LOCAL' && hasGardenPermission('garden:delete') && (
          <>
            <Button
              variant="contained"
              color="error"
              onClick={() => setOpen(true)}
            >
              Delete
            </Button>
            <Modal
              ...
            </Modal>
          </>
        ) }
      </CardActions>