LU-15222 build: Update ZFS version to 2.0.6

LU-15222 build: Update ZFS version to 2.0.6

Update ZFS version to 2.0.6. The changes are listed in:
https://github.com/openzfs/zfs/releases/tag/zfs-2.0.6

Change-Id: I2a7df45b79f402c3d3bce8b137edd11b5224b576
Signed-off-by: Jian Yu <yujian@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/45567
Reviewed-by: Nathaniel Clark <nclark@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Olaf Faaland-LLNL <faaland1@llnl.gov>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>