build: Add --vendor-name --vendor-patch-revision options to ./configure

build: Add --vendor-name --vendor-patch-revision options to ./configure

These options are for packagers and vendors to set so that when
Samba developers are debugging an issue, we know exactly which
package is in use, and so have an idea if any patches have been
applied.

This is included in the string that a Samba backtrace gives,
as part of the PANIC message.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15654
REF: https://lists.samba.org/archive/samba-technical/2024-May/138992.html

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>