openshift/os: no longer limit tests to build02

As per openshift/os#1551 (comment)
we should no longer have to limit tests to the build02 cluster since
OpenShift CNV was installed on all the build clusters.

This should make it easier for our jobs to get scheduled.

Author: jlebon

ci-operator/config/openshift/os/openshift-os-master.yaml

@@ -113,56 +113,48 @@ tests:
     from: src
   skip_if_only_changed: ^docs/|\.md$|^(?:.*/)?(?:\.gitignore|OWNERS|PROJECT|LICENSE)$
 - as: rhcos-9-build-test-qemu
-  cluster: build02
   commands: /src/ci/prow-entrypoint.sh rhcos-9-build-test-qemu
   container:
     from: build-image
   skip_if_only_changed: ^docs/|\.md$|^(?:.*/)?(?:\.gitignore|OWNERS|PROJECT|LICENSE)$
   timeout: 4h0m0s
 - as: rhcos-9-build-test-metal
-  cluster: build02
   commands: /src/ci/prow-entrypoint.sh rhcos-9-build-test-metal
   container:
     from: build-image
   skip_if_only_changed: ^docs/|\.md$|^(?:.*/)?(?:\.gitignore|OWNERS|PROJECT|LICENSE)$
   timeout: 3h0m0s
 - as: rhcos-96-build-test-qemu
-  cluster: build02
   commands: /src/ci/prow-entrypoint.sh rhcos-96-build-test-qemu
   container:
     from: build-image
   skip_if_only_changed: ^docs/|\.md$|^(?:.*/)?(?:\.gitignore|OWNERS|PROJECT|LICENSE)$
   timeout: 4h0m0s
 - as: rhcos-96-build-test-metal
-  cluster: build02
   commands: /src/ci/prow-entrypoint.sh rhcos-96-build-test-metal
   container:
     from: build-image
   skip_if_only_changed: ^docs/|\.md$|^(?:.*/)?(?:\.gitignore|OWNERS|PROJECT|LICENSE)$
   timeout: 3h0m0s
 - as: scos-9-build-test-qemu
-  cluster: build02
   commands: /src/ci/prow-entrypoint.sh scos-9-build-test-qemu
   container:
     from: build-image
   skip_if_only_changed: ^docs/|\.md$|^(?:.*/)?(?:\.gitignore|OWNERS|PROJECT|LICENSE)$
   timeout: 4h0m0s
 - as: scos-9-build-test-metal
-  cluster: build02
   commands: /src/ci/prow-entrypoint.sh scos-9-build-test-metal
   container:
     from: build-image
   skip_if_only_changed: ^docs/|\.md$|^(?:.*/)?(?:\.gitignore|OWNERS|PROJECT|LICENSE)$
   timeout: 3h0m0s
 - as: scos-10-build-test-qemu
-  cluster: build02
   commands: /src/ci/prow-entrypoint.sh scos-10-build-test-qemu
   container:
     from: build-image
   skip_if_only_changed: ^docs/|\.md$|^(?:.*/)?(?:\.gitignore|OWNERS|PROJECT|LICENSE)$
   timeout: 4h0m0s
 - as: scos-10-build-test-metal
-  cluster: build02
   commands: /src/ci/prow-entrypoint.sh scos-10-build-test-metal
   container:
     from: build-image