feat: added zfs storage pool configs [WD-8615]

[mas-who]

Done

• Added storage pool configs for zfs driver type

QA

1. Run the LXD-UI:
   • On the demo server via the link posted by @webteam-app below. This is only available for PRs created by collaborators of the repo. Ask @mas-who or @edlerd for access.
   • With a local copy of this branch, run as described here.
2. Perform the following QA steps:
   • Create a storage pool for zfs driver type, check that zfs pool configs can be set.
   • Edit an existing zfs stroage pool and update its configs

[webteam-app]

Demo starting at https://lxd-ui-687.demos.haus

[mas-who]

Instead of just adding zfs.clone_copy, I included the other storage pool level configs for the zfs driver as well. Reason is that the config form looks really empty with only one config, If that's too much I will remove the other configs.

[edlerd]

Some comments below.

[edlerd]

Did QA on a cluster backend, some comments on it below.

[mas-who]

tested ceph storage pools, no errors with config keys

[edlerd]

It seems a bit complex to have the getClusterPool
and the getMemberPool functions, that both rely on a generic getClusterAndMemberConfigs function. I think all three functions should be defined closer to each other. And then maybe we should collapse them to a single function, because we need, the memberPool and the clusterPool always together. Currently we evaluate getClusterAndMemberConfigs twice and are only ever interested into one of the two return values.

[mas-who]

It seems a bit complex to have the getClusterPool and the getMemberPool functions, that both rely on a generic getClusterAndMemberConfigs function. I think all three functions should be defined closer to each other. And then maybe we should collapse them to a single function, because we need, the memberPool and the clusterPool always together. Currently we evaluate getClusterAndMemberConfigs twice and are only ever interested into one of the two return values.

Sure, I will consolidate the logic into a single place and try simplify the dependencies a bit 👍

[edlerd]

LGTM, thanks for adding this 👍