Bug 34447: Do not export "Actions" columns

Bug 34447: Do not export "Actions" columns

In the KohaTable Vue component we should add the noExport class to the actions columns to not export them.

Test plan:
Go to the ERM module, create at least one agreement.
Go to the agreement list view and click "export" to export the table
=> Without this patch the "Actions" column was exported
=> With this patch is no longer there

Sponsored-by: BULAC - http://www.bulac.fr/
Signed-off-by: Sam Lau <samalau@gmail.com>
Signed-off-by: Pedro Amorim <pedro.amorim@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>