Feat: support multi-arch builds for releases

[AObuchow]

What does this PR do?

Uses docker buildx for building the devworkspace-controller image and project clone image in the release script.
Also sets up QEMU and a docker buildx builder in the release.yml workflow so that buildx will have a multi-arch builder setup prior to running make-release.sh

Note: excuse the merge commit, I'll remove it and rebase this PR before merging.

What issues does this PR fix or reference?

Part of #559

Is it tested? How?

Not tested as it requires running the release github action. Though I will try and simulate this on my fork and report back before having this merged, just wanted to get @amisevsk's eyes on it incase there's something that I'm missing in this fix.

PR Checklist

• E2E tests pass (when PR is ready, comment /test v8-devworkspace-operator-e2e, v8-che-happy-path to trigger)
  • v8-devworkspace-operator-e2e: DevWorkspace e2e test
  • v8-che-happy-path: Happy path for verification integration with Che

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (a371b8e) 52.74% compared to head (61f0522) 52.75%.
Report is 7 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1218      +/-   ##
==========================================
+ Coverage   52.74%   52.75%   +0.01%     
==========================================
  Files          84       84              
  Lines        7616     7616              
==========================================
+ Hits         4017     4018       +1     
+ Misses       3310     3309       -1     
  Partials      289      289              

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[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: amisevsk, AObuchow, ibuziuk

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[openshift-ci]

New changes are detected. LGTM label has been removed.

[AObuchow]

/retest

[AObuchow]

/retest

[amisevsk]

/retest

[openshift-ci]

@AObuchow: 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/v14-devworkspace-operator-e2e	61f0522	link	true	/test v14-devworkspace-operator-e2e

Full PR test history. Your PR dashboard.

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[AObuchow]

FWIW: I tested the release script with the buildx changes (and QEMU + buildx GH action setup) on my fork here and ensured that calling the release script without the dry-run parameter would build for all platforms.

[AObuchow]

The e2e test seems to have broken:

{  "devworkspace-operator-e2e" pod "devworkspace-operator-e2e-ipi-conf" failed: could not watch pod: the pod ci-op-6pvgllxq/devworkspace-operator-e2e-ipi-conf failed after 6s (failed containers: test): ContainerFailed one or more containers exited

Container test exited with code 1, reason Error
---
Installing from release registry.build05.ci.openshift.org/ci-op-6pvgllxq/release@sha256:073a4e46289be25e2a05f5264c8f1d697410db66b960c9ceeddebd1c61e58717
/bin/bash: line 19: /var/run/secrets/ci.openshift.io/cluster-profile/ssh-publickey: No such file or directory
{"component":"entrypoint","error":"wrapped process failed: exit status 1","file":"k8s.io/test-infra/prow/entrypoint/run.go:84","func":"k8s.io/test-infra/prow/entrypoint.Options.internalRun","level":"error","msg":"Error executing test process","severity":"error","time":"2024-01-15T19:04:44Z"}
error: failed to execute wrapped command: exit status 1
---
Link to step on registry info site: https://steps.ci.openshift.org/reference/ipi-conf
Link to job on registry info site: https://steps.ci.openshift.org/job?org=devfile&repo=devworkspace-operator&branch=main&test=devworkspace-operator-e2e&variant=v14}

Merging anyway as this PR only modifies the release script + GH release action which are not tested in e2e test.