a duplicated view is broken until caches are cleared

Problem/Motivation

I had a view built using facets, and I duplicated it using the UI in Views.

The new duplicate view was crashing here:

> return $this->getFacetSource()->getDataDefinition($this->field_identifier);

because the $facet_source_plugin_manager didn't have a definition for the facet source ID.

A `drush cr` fixed the problem, so it looks like a plugin cache should be getting cleared when a view is duplicated, but isn't.

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes