feat: add version check for sno agent

SNO ABI flow will support min 4vCPU in 4.22 and above, so older versions will not pass validation
adding check to fail early

Removed SNOMIN in favor of setting the default across the board

Signed-off-by: ehila <ehila@redhat.com>

Author: eggfoobar

common.sh

@@ -521,21 +521,12 @@ if [[ ! -z ${AGENT_E2E_TEST_SCENARIO} ]]; then
           export WORKER_MEMORY=9000
           ;;
       "SNO" )
-          export NUM_MASTERS=1
-          export MASTER_VCPU=8
-          export MASTER_DISK=100
-          export MASTER_MEMORY=32768
-          export NUM_WORKERS=0
-          export NETWORK_TYPE="OVNKubernetes"
-          export AGENT_PLATFORM_TYPE="${AGENT_PLATFORM_TYPE:-"none"}"
-          if [[ "${AGENT_PLATFORM_TYPE}" != "external" ]]  && [[ "${AGENT_PLATFORM_TYPE}" != "none" ]]; then
-            echo "Invalid value ${AGENT_PLATFORM_TYPE},  use 'none' or 'external'."
-            exit 1
+          local vcpu="4"
+          if is_lower_version "$OPENSHIFT_VERSION" "4.22"; then
+              vcpu="8"
           fi
-          ;;
-      "SNOMIN" )
           export NUM_MASTERS=1
-          export MASTER_VCPU=4
+          export MASTER_VCPU="${vcpu}"
           export MASTER_DISK=100
           export MASTER_MEMORY=32768
           export NUM_WORKERS=0