[TASK] Streamline ext_tables.sql of compatibility ext

Move the 2 fields of tt_content into one table definition.

Resolves: #79767
Releases: master
Change-Id: Ie376d095f1ebc4611635b0c487d43796ffa6fdc9
Reviewed-on: https://review.typo3.org/51645


Reviewed-by: Thomas Hohn <thomas@hohn.dk>
Tested-by: Thomas Hohn <thomas@hohn.dk>
Reviewed-by: Andreas Fernandez <typo3@scripting-base.de>
Tested-by: Andreas Fernandez <typo3@scripting-base.de>