smbd: use op->global->open_global_id for the share_mode_entry.share_file_id

smbd: use op->global->open_global_id for the share_mode_entry.share_file_id

open_global_id is an uint32_t, share_file_id is an uint64_t.

For internal opens that don't have an smbXsrv_open_global.tdb entry, continue to
use a generation counter starting at UINT32_MAX + 1.

We don't expose internal opens via srvsrc, which imposes the requirement for
using an uint32_t, so we can use larger ids for the internal opens as srvsvc
never sees them (as they're not in smbXsrv_open_global.tdb and srvsvc as any
other component listing open files like smbstatus lists smbXsrv_open_global.tdb).

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>
Autobuild-User(master): Volker Lendecke <vl@samba.org>
Autobuild-Date(master): Fri Oct 10 11:43:16 UTC 2025 on atb-devel-224