[14.0][MIG] mass operation abstract

[michotm]

Migration of mass operation abstract to be able to migrate module mass_editing to 14.0

[ivantodorovich]

Hi @michotm !

Thanks for your contribution.

There have been some discussions about the need of this module, and apparently the idea is to deprecate it in favour of ir.actions.server.

Here are the mentioned discussions:

• [12.0][ADD] report_label reporting-engine#457 (comment)
• [13.0][ADD] mass action #97 (review)

AFAIK this module is only depended by mass_editing, and based on those discussions it should be refactored and thus we can remove this module

ping @legalsylvain @hbrunn

[CasVissers-360ERP]

Can be closed #255 is merged without the need of this module.

[pedrobaeza]

Maybe it's used by other module than mass_editing, but Travis is red, so I don't think this one will flourish, so closing.