Breaking: #101129 - Convert Action to native backed enum
See forge#101129
Description
The class 
        \TYPO3\ is now
converted to a native backed enum. In addition the class is moved to
the namespace 
        \TYPO3\ and renamed to
        Scheduler.
Impact
Since 
        \TYPO3\ is no longer
a class, the existing class constants are no longer available.
In addition it's not possible to instantiate it anymore.
Affected installations
Third-party extensions using the following class constants:
\TYPO3\CMS\ Scheduler\ Task\ Enumeration\ Action:: ADD \TYPO3\CMS\ Scheduler\ Task\ Enumeration\ Action:: EDIT \TYPO3\CMS\ Scheduler\ Task\ Enumeration\ Action:: LIST 
Class instantiation:
new Action('a- string') 
Migration
Include the enum 
        Scheduler from namespace 
        \TYPO3\
as a replacement for 
        Action.
Use the new syntax
\TYPO3\CMS\ Scheduler\ Scheduler Management Action:: ADD \TYPO3\CMS\ Scheduler\ Scheduler Management Action:: EDIT \TYPO3\CMS\ Scheduler\ Scheduler Management Action:: LIST 
as well as the 
        try static method of the backed enum.