Bump grootfs
Bump grootfs

  > Simplify config testing at integration level
  > Refactor config builder unit tests
  > Add support newuidmap_bin and newgidmap_bin to config file
  > Remove the no longer necessary btrfs bin validation
  > Refactor of the integration tests `Runner`
  > Simplify IDMapper initializer arguments for new binaries

masters-of-cats/grootfs-release,masters-of-cats/grootfs-release