restructure go code to be more similar to rust

[codecov[bot]]

Codecov Report

Attention: 16 lines in your changes are missing coverage. Please review.

Files	Coverage Δ
lib/go/cloudprov/scaler.go	0.00% <ø> (ø)
lib/go/pod/pod.go	63.33% <100.00%> (ø)
lib/go/pod/manager.go	75.71% <50.00%> (ø)
lib/go/cloudprov/cloudprov.go	59.73% <62.50%> (ø)
vnode/vnode.go	40.00% <0.00%> (ø)
lib/go/node/node.go	63.01% <20.00%> (ø)

... and 1 file with indirect coverage changes

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