[TASK] Remove extbase table column cache

The extbase table column cache "extbase_typo3dbbackend_tablecolumns"
stores all DB fields of all DB tables to detect if the TCA table contains
a field named "pid".

However, if a DB table has a TCA definition but no PID, then it fails
at so many places. No need to execute a admin_get_fields call on every
method call.
(Which caches this information - ironically - in the database by default)

The cache can be removed without substitution as the superfluous
check on the DB field "pid" is removed.

Resolves: #77411
Releases: master, 7.6
Change-Id: Ib4dca4e5f895f0e4334c26482423b833dcb773ca
Reviewed-on: https://review.typo3.org/49396


Reviewed-by: Nicole Cordes <typo3@cordes.co>
Tested-by: Nicole Cordes <typo3@cordes.co>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>