[BUGFIX] Filter and mapping field columns are too small in database

Sometimes filters and mappings are longer than 255 characters.
Currently the database restricts them partially to tinytext (255).

This patch extends all "_filter" and "_mapping" fields to text
and changes the corresponding TCA fields to text areas.

Resolves: #60188
Change-Id: Ia69e24ae21cdba57d83dc8696252164ce64d922d
Reviewed-on: https://review.typo3.org/31514
Reviewed-by: Xavier Perseguers
Tested-by: Xavier Perseguers