nixos/lib/make-ext4-fs: fall back to resize2fs -M if exact resize fails
nixos/lib/make-ext4-fs: fall back to resize2fs -M if exact resize fails

See also
- https://bugs.launchpad.net/ubuntu/+source/e2fsprogs/+bug/1415077/comments/4
- https://github.com/NixOS/nixpkgs/pull/62262

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