return the embedded cluster version with the node join response #4470
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What this PR does / why we need it:
Joining a cluster with the wrong k0s version fails. Returning the version along with the node join command allows the CLI to check this in the future.
Which issue(s) this PR fixes:
Fixes #
Special notes for your reviewer:
Steps to reproduce
Does this PR introduce a user-facing change?
Does this PR require documentation?