Stop integration of unwanted data

[antirotor]

Feature

We need to remove custom data before it is integrated to database. To tag them, we can add remove tag to representation. Then it will be skipped by integrate_new. For Ftrack components we need to make it independent of integrate_new - take path from component either from path provided by integrator or if not existing (it was not integrated) build the path from staging dir and files.

We can remove arbitrary files with #377 and also implement filtering system we already have to tag specific data - for example mark all exr files in render.