Extend install-proto script to use local file from Hermeto

[xperimental]

This PR extends the install-proto.sh script used by vector so that it checks if the required zip-file is already available in a pre-defined location which is used by Cachi2/Hermeto, the dependency fetcher of our downstream build. If the file is available locally, it is not downloaded from github.

Required by openshift-eng/ocp-build-data#10574

/cc @vparfonov
/assign @jcantrill
/label tide/merge-method-squash

[openshift-ci]

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[vparfonov]

/test cluster-logging-operator-e2e

[vparfonov]

/lgtm

[vparfonov]

/test cluster-logging-operator-e2e

[xperimental]

/retest-required

[xperimental]

/retest-required

[openshift-ci]

@xperimental: 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/cluster-logging-operator-e2e	f2bf778	link	true	/test cluster-logging-operator-e2e

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[xperimental]

@jcantrill It looks like the "TLS scanner" test is timing out. Is that something that would be affected by a change to the ART Dockerfile or the script? (can't think of a connection myself)

Does it make sense to override the test if the failure is not valid?