[QE] Misc fixes for the QE e2e images

[anjannath]

• In the run.sh script the ${OS} variable referred to on the scripts is only present when running inside the container, we'll have to figure out a different way to get the OS information when running on the host

• update base images to go-toolset:1.21

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: adrianriobo

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[openshift-ci[bot]]

@anjannath: The following tests 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	52d7fdaa3076de9fe2b93dd1c74c3745ca797c9d	link	false	/test security
ci/prow/integration-crc	52d7fdaa3076de9fe2b93dd1c74c3745ca797c9d	link	true	/test integration-crc

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