Breaking: #67824 - typo3/ext folder removed

See forge#67824

Description

The folder typo3/ext does not exist in the default core package anymore. The functionality to have global extensions in this directory is not touched.

Impact

In case global extensions are moved to this directory during deployment or rollout, the directory must be created before, now.

Affected Installations

Instances that use global extensions within typo3/ext.

Migration

Create directory typo3/ext before moving extensions into this folder.