Improper transaction handling with CatalogContentProvider Copy

Description

CatalogContentProvider.Copy has no transaction handling. So, the updated events are fired as soon as a version is created. This can cause problems as listeners to those events can try to load versions of that content and, as non-master language versions are created/updated, CatalogContentVersionStore creates those versions and interferes with the process.

Steps to produce:

1. Install Find.Commerce.
2. Make sure the catalog has two or more languages enabled.
3. Publish an entry in all languages.
4. Copy the enrty to another category.

Expected:
It is published in all languages, and there are no extra versions

Actual:
There are draft versions set as common drafts.