chore: enable hermetic builds and prefetched dependencies

[lance]

Required for RHTAP Enterprise Contract

[lance]

/test "Red Hat Trusted App Test / cosign / rhtas-cli-1-0-beta-enterprise-contract"

I don't think this will work, but let's try it

[openshift-ci]

@lance: No presubmit jobs available for securesign/[email protected]

In response to this:

/test "Red Hat Trusted App Test / cosign / rhtas-cli-1-0-beta-enterprise-contract"

I don't think this will work, but let's try it

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[lance]

/retest

[JasonPowr]

/lgtm

[openshift-ci]

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