s3:libsmb: let cli_tree_connect_creds() only call cli_credentials_get_password()...

s3:libsmb: let cli_tree_connect_creds() only call cli_credentials_get_password() if needed

Only legacy protocols need a password for share level authentication,
so avoid triggering the password prompt for the common case.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15018

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Tue Apr 23 15:21:38 UTC 2024 on atb-devel-224