Upgrading to Plone 6 resets behaviors

[szakitibi]

The upgrade step 1015 reapplies typeinfo as during Plone 5.2 to Plone 6 upgrades. The upgrade step can be found here:

collective.easyform/src/collective/easyform/upgrades/1015.zcml

Line 14 in 00fe42d

import_steps="typeinfo"

As a result any additional behaviors registered for EasyForm will be purged and the behavior registrations are restored to the product default. The upgrade step 1015 should not purge behaviors and apply only the necessary changes.

Steps to reproduce:

1. Create a plone 5 site with collective.easyform 3.x (used 3.2.1), make it multilingual and install easyform addon
2. In Site Setup / Dexterity Types / EasyForm activate "plone.translatable" behavior if it is not activated already
3. Create an EasyForm, translate it to test "plone.translatable" works
4. Update requirements.txt and buildout.cfg to plone 6 and collective.easyform version pin to 4.x (used 4.2.1)
5. Upgrade Plone site (@@plone-upgrade) and apply collective.easyform upgrade steps

What happened

The "plone.translatable" behavior is not registered for EasyForm.

What I expect

The "plone.translatable" behavior is still registered for EasyForm.