ci: Fix unintended loop behavior when checking docker registry health #450

Job	Run time
e2e-pr / operator tests (kata-qemu, ubuntu-20.04)	19m 4s
e2e-pr / operator tests (kata-qemu, ubuntu-20.04)	19m 4s
e2e-pr / operator tests (kata-qemu, ubuntu-20.04)	19m 4s
e2e-pr / operator tests (kata-qemu, ubuntu-22.04)	18m 58s
e2e-pr / operator tests (kata-qemu, ubuntu-22.04)	18m 58s
e2e-pr / operator tests (kata-qemu, ubuntu-22.04)	18m 58s
e2e-pr / operator tests (kata-qemu, s390x-large)	1m 20s
e2e-pr / operator tests (kata-qemu, s390x-large)	15m 10s
e2e-pr / operator tests (kata-qemu, s390x-large)	15m 10s
e2e-pr / operator tests (kata-qemu-tdx, tdx)	2m 2s
e2e-pr / operator tests (kata-qemu-tdx, tdx)	2m 2s
e2e-pr / operator tests (kata-qemu-tdx, tdx)	21m 36s
e2e-pr / operator tests (kata-qemu-sev, sev)	10m 24s
e2e-pr / operator tests (kata-qemu-sev, sev)	10m 24s
e2e-pr / operator tests (kata-qemu-sev, sev)	10m 24s
e2e-pr / operator tests (kata-qemu-snp, sev-snp)	1m 32s
e2e-pr / operator tests (kata-qemu-snp, sev-snp)	1m 32s
e2e-pr / operator tests (kata-qemu-snp, sev-snp)	10m 43s
	3h 36m 25s

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