Bug 16829: make logaction and GetLogs aware of the interface column

Bug 16829: make logaction and GetLogs aware of the interface column

This patch changes the logaction API so it accepts a new 'interface' param.
Current code calling logaction is not changed, and this parameter can be ommited
in most contexts, and it will correctly fall-back to C4::Context->interface.

Unit tests are provided on a different patch.

GetLogs gets patched as well, so it can be required to filter by 'interface' param.

Sponsored-by: NEKLS
Signed-off-by: Nicole C Engard <nengard@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>