[4.9] Remove `yq` curls from CI steps

+++ This bug was initially created as a clone of https://issues.redhat.com//browse/OCPBUGS-784

Various CI steps use the upi-installer container for it's access to the
aws cli tools among other things. However, most of those steps also
curl yq directly from GitHub. We can save ourselves some headaches
when GitHub is down by just embedding the binary in the image already.

Whenever GitHub has issues or throttles us, YQ hash mismatch error out. The hash mismatch error is because github is probably returning an error page, although our scripts hide it.

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