feat: for schema tests, try to use pg_dump

Author: samrose

nix/tools/dbmate-tool.sh.in

@@ -187,9 +187,9 @@ perform_dump() {
     local attempt=1
 
     while [ $attempt -le $max_attempts ]; do
-        echo "Attempting dbmate dump (attempt $attempt/$max_attempts)"
+        echo "Attempting pg_dump (attempt $attempt/$max_attempts)"
 
-        if dbmate dump; then
+        if "${PSQLBIN}/pg_dump" -h localhost -p "$PORTNO" -U "$PGSQL_SUPERUSER" -d postgres --schema-only --no-owner --no-privileges > "./db/schema.sql"; then
             return 0
         fi