mdssvc: fix kMDScopeArray parsing

In macOS Ventura marshalling of kMDScopeArray in the "openQueryWithParams"
request has changed from

  string: kMDScopeArray
  sl_array_t(#1): {
    string: /foo/bar
  }

to:

  string: kMDScopeArray
  sl_array_t(#1): {
    sl_array_t(#1): {
      string: /foo/bar
    }
  }

With this patch we check both encodings. Bug fixed according to user feedback.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15299
RN: Spotlight doesn't work with latest macOS Ventura

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
