ZFS improvements (L2ARC and other params)

[themoriarti]

Add option how to install and work with ZFS. One of the important points is the management of the memory size for L2ARC and other options.

I think it is worth limiting this size by default to the level of 30% of the total memory size, this will be enough.

And the maximum would be good implement full list ZFS module parameters https://openzfs.github.io/openzfs-docs/Performance and Tuning/Module Parameters.html

I think it would be a good solution to be able to transfer and setup any of the parameters on the fly through CRD.