Unit tests failing as setup-envtest.sh from kubernetes-sigs/controller-runtime now returns a 404

[bradfordcp]

In the GH action run of our unit tests there was a sudden failure.

o fmt ./pkg/...
pkg/cleaner/cleaner.go
pkg/cleaner/cleaner_test.go
go fmt ./tests/...
go vet ./pkg/...
go vet ./tests/...
go test  -test.timeout=3m ./tests/unit/... -coverprofile cover.out
ok  	github.com/k8ssandra/k8ssandra/tests/unit	76.584s	coverage: [no statements]
?   	github.com/k8ssandra/k8ssandra/tests/unit/utils/cassdc	[no test files]
?   	github.com/k8ssandra/k8ssandra/tests/unit/utils/helm	[no test files]
?   	github.com/k8ssandra/k8ssandra/tests/unit/utils/kubeapi	[no test files]
?   	github.com/k8ssandra/k8ssandra/tests/unit/utils/traefik	[no test files]
mkdir -p /home/runner/work/k8ssandra/k8ssandra/testbin
test -f /home/runner/work/k8ssandra/k8ssandra/testbin/setup-envtest.sh || curl -sSLo /home/runner/work/k8ssandra/k8ssandra/testbin/setup-envtest.sh https://raw.githubusercontent.com/kubernetes-sigs/controller-runtime/master/hack/setup-envtest.sh
source /home/runner/work/k8ssandra/k8ssandra/testbin/setup-envtest.sh && fetch_envtest_tools /home/runner/work/k8ssandra/k8ssandra/testbin && setup_envtest_env /home/runner/work/k8ssandra/k8ssandra/testbin && go test  -test.timeout=3m ./pkg/... -coverprofile cover.out
/home/runner/work/k8ssandra/k8ssandra/testbin/setup-envtest.sh: line 1: 404:: command not found
make: *** [Makefile:35: pkg-test] Error 127
Error: Process completed with exit code 2.

Looking at the logic our curl of https://raw.githubusercontent.com/kubernetes-sigs/controller-runtime/master/hack/setup-envtest.sh returns

404: Not Found

[burmanm]

controller-runtime decided to remove the script that all operator-sdk test-generators use suddenly 5 days ago.

[burmanm]

operator-framework/operator-sdk#4856