[FEATURE] Support @Flow\Inject annotations in Extbase

This patch provides support for the TYPO3.Flow syntax
of property injections:

/**
 * @var Vendor\Ext\FooClass
 * @Flow\Inject
 */
protected $vendorExtFooClass;

Resolves: #49497
Releases: 6.2
Change-Id: Ib5f0ff5e83580cc9c327b7320f49c5a892240eb5
Reviewed-on: https://review.typo3.org/21732
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Helmut Hummel
Tested-by: Helmut Hummel
Reviewed-by: Stefan Neufeind
Tested-by: Stefan Neufeind