[BUGFIX] Disallow phpdocumentor/reflection-docblock >= 4.3.2

The package phpdocumentor/reflection-docblock introduces major regressions
starting with 4.3.2 that leads to getting nullable compound types (e.g.
`?string|int`) parsed completely wrong, which currently also breaks in
symfony/property-info.

Also, it became stricter about type annotations which currently collides
with Fluid.

For this reason, the package is marked as conflicting starting with
version 4.3.2.

Resolves: #89167
Releases: master
Change-Id: Ife9d14c01de5bea2179dafc572820f292039a202
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/61702


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>