[12.0] Added purge actions for ir.actions.act_window and ir.ui.view

[ypapouin]

Purge actions: This is essentially a copy of the purge obsolete menu wizard. I made it to be able to remove obsolete actions that blocks opening view settings in odoo 12 due to _compute_search_view and _compute_params from ir_actions.py raising an exception.

[thomaspaulb]

@ypapouin Needs a rebase on latest

[github-actions[bot]]

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