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Single Node Cluster creation scripts for OpenShift 4.x as used by CodeReady Containers

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Once podman 4.1.1 is available in fcos36, https://github.com/code-ready/snc/pull/538 should be reverted.

We had enough discussions around not to use `ocp-dev-preview` as mirror link and make sure master branch always have latest ocp release which we ship as part of crc. But...

https://github.com/containers/podman/releases/tag/v4.0.2 now have arch info in the remote binary tarball which was not there during 3.x releases so we need to update our podman bundle creation stuff accordingly. ``` +...

This is tracker issue to update all the images which are used by bundle (openshift/podman) - gvisor-tap-vsock - dnsmasq

**Goals** Enable various levels of Single node OpenShift experience for CRC users based on the availability of resources on their laptops Please check out this [doc](https://docs.google.com/document/d/1sCBP-Qe8KrKxvL0wLG8tY93VD2cUvYj5GhimLDMsjb0/edit#) for trying out instructions...

needs-rebase
do-not-merge/hold
ok-to-test

Rather than kubernetes/conformance, this attempts to run openshift reliability/minimal tests. This also adds some tests to ignore list which was failing during testing due to apiserver unavailblity or single node...

approved
do-not-merge/hold

This issue is for follow up discussion https://github.com/code-ready/snc/pull/457#discussion_r687112238

Rather than kubernetes/conformance, this attempts to run openshift/conformance. This disables all the instrumentation, network, node, scheduling and storage tests as I did not have time to look in details at...

approved
do-not-merge/hold

Current generated bundle for 4.8 is sized around 3.2 GB which need further investigation, is it because of we enable MCO or something else.

need-more-info

Edge introduced a new way to bootstrap the cluster without an auxiliary VM. Perhaps snc could use it to simplify the startup sequence. Ideas can be taken from: https://github.com/eranco74/bootstrap-in-place-poc