refactor: improve testability of context construction

Author: teoincontatto

stackgres-k8s/e2e/spec/restore

@@ -126,8 +126,6 @@ e2e_test() {
 
   run_test "Check that restore using PITR" check_restore_using_pitr
 
-  run_test "Check that backup is compatible with cluster" check_backup_pg_version
-
   run_test "Check that after deleting original backup the backup is not deleted if a copy exists" \
     check_delete_original_backup_dont_delete_backup_if_copy_exists
 
@@ -393,37 +391,6 @@ check_restore_using_pitr() {
   fi
 }
 
-check_backup_pg_version() {
-  ALTERNATIVE_PG_VERSION="12.9"
-  if [ "${E2E_POSTGRES_VERSION%.*}" = "${ALTERNATIVE_PG_VERSION%.*}" ]
-  then
-    ALTERNATIVE_PG_VERSION="13.5"
-  fi
-
-  local RESULT EXIT_CODE
-  try_function create_or_replace_cluster "$ALTER_CLUSTER_NAME" "$CLUSTER_NAMESPACE" 1 \
-    --set instanceProfiles=null \
-    --set-string "cluster.configurations.sgPostgresConfig=alter-postgresconf" \
-    --set-string "cluster.configurations.sgPoolingConfig=alter-pgbouncerconf" \
-    --set-string "cluster.postgres.version=$ALTERNATIVE_PG_VERSION" \
-    --set cluster.initialData.restore.fromBackup.name="$BACKUP_NAME" 2> "$LOG_PATH/create-alter-cluster.log"
- 
-  if "$RESULT"
-  then
-    echo "ERROR: It should not be able to install a cluster with postgres version that is different than the backup pg version"
-    return 1
-  else
-    success "Cluster was not created"
-  fi
-
-  if grep -q "Cannot restore from SGBackup $BACKUP_NAME" "$LOG_PATH/create-alter-cluster.log"
-  then
-    success "Error message was the expected"
-  else 
-    fail "Unexpected error message $ERROR_MESSAGE"
-  fi
-}
-
 check_delete_original_backup_dont_delete_backup_if_copy_exists() {
   BACKUP_INTERNAL_NAME="$(kubectl get sgbackups.stackgres.io -n "$BACKUP_CLUSTER_NAMESPACE" "$BACKUP_SOURCE_NAME"\
     --template '{{ .status.internalName }}')"