Kubernetes: add local storage

[YuryHrytsuk]

What do these changes do?

• Use https://github.com/topolvm/topolvm CSI (see Kubernetes: add local storage class #1066 for tool analysis)
• Document how to update disks on Longhorn

Related issue/s

• closes Kubernetes: add local storage class #1066

Related PR/s

• https://git.speag.com/oSparc/osparc-ops-deployment-configuration/-/merge_requests/1471

Checklist

• I tested and it works

[YuryHrytsuk]

Zero downtime updating longhorn disks (procedure)

1. Go to LH GUI and select a Node
   1. Disable scheduling
   2. Request eviction
2. Remove disk from the node
3. Do disks updates on the node
4. Wait till LH automatically adds the disk back
   • LH may have already added the disk back while you was configuring it. To make sure configuration is correct, remove the prematurely detected disk

[mrnicegyu11]

I read the assoc. issue and got the rough idea, looks good. If it works we should - as you already wrote - also add this to the ansible :--) good luck!