LU-14170 build: Update ZFS version to 2.0.0

Major New Features
* Sequential resilver
* Persistent L2ARC
* ZStandard compression
* Redacted zfs send/receive

Notable Changes
* Added fallocate(mode-0/2) compatibility to preallocate space.
* Reorganized the zfs and zpool man pages by splitting out each
  subcommand in to its own page.
* Enabled the systemd zfs-mount-generator by default on Linux.
* More relevant and useful ZED syslog entries.
* Provided pam module for automatically loading zfs encryption
  keys for home datasets.
* Support for inheriting and setting user properties in channel
  programs.
* Improved bootloader support.
* Optionally colorized zpool status output.

Change-Id: Ia00d46a4cb54be94d4fdc0145a2d474ea987cf74
Signed-off-by: Jian Yu <yujian@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/40822
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Alex Zhuravlev <bzzz@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Nathaniel Clark <nclark@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>