Rewrite get-resource.sh in a real programming language

[dtantsur]

The file clearly exceeds the limits of bash, as was especially evident in the recent extensions fix.

Let us rewrite it in either Go or Python (depending on the skills of the person who will be doing it).

/kind feature
/help
/lifecycle frozen

[metal3-io-bot]

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In response to this:

The file clearly exceeds the limits of bash, as was especially evident in the recent extensions fix.

Let us rewrite it in either Go or Python (depending on the skills of the person who will be doing it).

/kind feature
/help
/lifecycle frozen

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[Rozzii]

/triage accepted