remove workshops

[goern]

• add nostromo overlay
• remove reference to externalsecrets
• :bug: fix apiVersion of CronJob
• :sparkles: add alpha.image.policy.openshift.io/resolve-names: '*' to deployments
• :sparkles: add sealedsecrets for prow
• :sparkles: add sealedsecrets for prow
• :sparkles: add alpha.image.policy.openshift.io/resolve-names: '*' to deployments
• :sparkles: add sealedsecrets for prow
• :sparkles: add CRD for prow
• configured prow-emea
• smoooll cleanup
• use sha to address crier image
• use upstream and sha to address image
• update s3-credentials of prow
• update s3-credentials of prow
• 🔐 re-encrypted s3-credentials of prow
• 🔐 re-encrypted s3-credentials of prow
• 🔐 re-encrypted s3-credentials of prow
• 🔐 re-encrypted s3-credentials of prow
• reconfigure prow's bucket
• reconfigure prow's bucket
• move github-token and hmac to op1st-emea-b4mad repo
• move ghproxy to op1st-emea-b4mad repo
• move config and plugins to op1st-emea-b4mad repo
• :arrow_down: no longer required
• ⚡ removing the workshop related stuff #clarety

[op1st-prow[bot]]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[op1st-prow[bot]]

@goern: 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
aicoe-ci/prow/kustomize-build	6dd8de2b13bb1b9d61a624c56241b7bfdc82cfe4	link	true	/test kustomize-build
aicoe-ci/prow/pre-commit	6dd8de2b13bb1b9d61a624c56241b7bfdc82cfe4	link	true	/test pre-commit

Full PR test history. Your PR dashboard. Please help us and open an issue when you hit one in your PR.

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