Disable contact maps on all architectures
This feature requires the unmaintained libchamplain and clutter libraries, which should not be included in Debian 14.
Mitigates: #1104718
Closes: #659512, #1018120
Now that Debian 13 is out, I think it's time we disable this.
(If we rebuild an updated evolution for Debian 13 stable updates, this will probably have to be reverted in that version, to maintain feature parity.)
Untested, I don't use Evolution myself.