Fix CI test job by replacing deprecated kubebuilder-tools with setup-envtest#20

Okabe-Junya merged 1 commit intomercari-mastermercari/actions-runner-controller:mercari-masterfrom

Okabe-Junya/fix/ci-kubebuilder-toolsmercari/actions-runner-controller:Okabe-Junya/fix/ci-kubebuilder-toolsCopy head branch name to clipboard