bdd: use python library where possible

Replace calls to PHP scripts with direct calls into the
nominatim Python library where possible. This speed up
tests quite a bit.

lib-php/admin/setup.php

@@ -69,7 +69,11 @@ $iInstances = max(1, $aCMDResult['threads'] ?? (min(16, getProcessorCount()) - 1
 
 function run($oCmd) {
     global $iInstances;
+    global $aCMDResult;
     $oCmd->addParams('--threads', $iInstances);
+    if ($aCMDResult['ignore-errors'] ?? false) {
+        $oCmd->addParams('--ignore-errors');
+    }
     $oCmd->run(true);
 }