Decode gzip compressed base64 encoded data from MachineConfig

Issue

Getting garbage values when gzip compressed source data from MachineConfig is decoded using base64 -d.

# echo 'H4sIAAAAAAAC/0zMMU7EMBCF4d6nSEN<..>bn+gVJcpvAfAAD//wnBcCDhAAAA' | base64 -d
<..>
<Random unreadable garbage data in the output>
<..>

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