JulienBalestra: controller/discoverer: add readiness check

JobBuild
135
08-13 14:52
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pull-sig-storage-local-static-provisioner-e2e 1171401833495662595 1169909105553313793 1163786469324623881 1163749097119682561 1162459231211753473 1162458353700442114 1161310911063920641 1161306754013728771 1161296939409477638 1161289394242457603
pull-sig-storage-local-static-provisioner-e2e-gke 1171401833495662594 1169909105553313795 1163786469324623879 1163749097119682560 1162459231211753475 1162458353704636417 1161310911063920640 1161308267553492992 1161306754017923072 1161296939409477637 1161289394242457602
pull-sig-storage-local-static-provisioner-test 1171401833491468288 1169909105553313796 1163786469324623882 1162459231211753477 1162458353700442113 1161310911063920642 1161308267545104384 1161306754013728770 1161296939413671938 1161289394246651904
pull-sig-storage-local-static-provisioner-verify 1171401833495662593 1169909105553313797 1163786469324623880 1162459231211753476 1162458353704636416 1161310911114252289 1161308267549298688 1161306754013728769 1161296939413671936 1161289394246651905