chore: update OpenShift metadata version to 4.19 (cloudnative-pg#7358)

Closes cloudnative-pg#7408

Signed-off-by: Jonathan Gonzalez V. <jonathan.gonzalez@enterprisedb.com>
(cherry picked from commit c7e8d50)

Author: sxd

Makefile

@@ -60,7 +60,7 @@ WOKE_VERSION ?= 0.19.0
 OPERATOR_SDK_VERSION ?= v1.39.2
 OPM_VERSION ?= v1.51.0
 PREFLIGHT_VERSION ?= 1.13.0
-OPENSHIFT_VERSIONS ?= v4.12-v4.18
+OPENSHIFT_VERSIONS ?= v4.12-v4.19
 ARCH ?= amd64
 
 export CONTROLLER_IMG