Merge pull request #73239 from mattkelly/bugfix/kubeadm-sa-cert-dir

Add back --cert-dir option for kubeadm init phase certs sa

cmd/kubeadm/app/cmd/phases/certs.go

@@ -115,6 +115,7 @@ func newCertSubPhases() []workflow.Phase {
 		Short:        "Generates a private key for signing service account tokens along with its public key",
 		Long:         saKeyLongDesc,
 		Run:          runCertsSa,
+		InheritFlags: []string{options.CertificatesDir},
 	}
 
 	subPhases = append(subPhases, saPhase)