NAS-132988 / 24.10.2 / Remove dedupcached property (by usaleem-ix)

[bugclerk]

Automatic cherry-pick failed. Please resolve conflicts by running:

git reset --hard HEAD~1
git cherry-pick -x e648e4bc0f012c13dc48e32032b421fbe20d6779

If the original PR was merged via a squash, you can just cherry-pick the squashed commit:

git reset --hard HEAD~1
git cherry-pick -x 5586e0bdd480739e6011b1490a2aefc93ac4118e

py-libzfs is updated in truenas/py-libzfs#293 to not retrieve dedupcached property along with other hidden zpool properties.

Original PR: #15191
Jira URL: https://ixsystems.atlassian.net/browse/NAS-132988

[yocalebo]

We never exposed this in our schema in EE, so closing PR.