Move deprecated ext_typoscript_setup/constants.txt to Configuration/TypoScript

[hansup]

The following TS files are deprecated for the reason that they can not be overwritten if the root flag of the root TS template is NOT set:
ext_typoscript_constants.txt
ext_typoscript_setup.txt

See i.e. https://forge.typo3.org/issues/22169

Please move them to:
Configuration/TypoScript/constants.typoscript
Configuration/TypoScript/setup.typoscript

[abvdveen]

Could this be added in a next release? Now I have to add the ext manually to my typo3 exts, not with composer, to be able to modify the code myself.