WIP Konflux mode internal hermetic, prefetch

[ashwindasr]

Changes in this PR:

• internal-hermetic mode, which uses proxies to restrict network access to RH internal
• add prefetch feature for pip

ocp-build-data change: openshift-eng/ocp-build-data#6003

[openshift-ci]

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[openshift-ci]

@ashwindasr: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/security	0199534	link	false	/test security

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