Refactor dba_(p)open() to be more sensible (#7610)

Actually use ZPP
Throw ValueErrors for invalid values
Use dedicated struc members for file permission and map size instead of a zval stack

Author: Girgias

UPGRADING

@@ -77,6 +77,8 @@ PHP 8.2 UPGRADE NOTES
 ========================================
 
 - DBA
+  . dba_open() and dba_popen() now have the following enforced function signature
+    dba_open(string $path, string $mode, ?string $handler = null, int $permission = 0o644, int $map_size = 0)
   . dba_fetch()'s optional skip argument is now at the end in line with
     PHP userland semantics its signature now is:
     dba_fetch(string|array $key, $dba, int $skip = 0): string|false