refactor(cluster tool): use []string for talos cmds

[PrivatePuffin]

Is your feature request related to a problem?

currently cmds are generated as a string (see genApply) and later-on splitter into a []string for each individual command portion.

This might lead to issues with merging and resplitting based on space locations

Describe the solution you'd like

It is cleaner and less error prone to output the cmds into []string directly instead

Describe alternatives you've considered

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Additional context

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I've read and agree with the following

• [x] I've checked all open and closed issues and my request is not there.
• [x] I've checked all open and closed pull requests and my request is not there.