[BUGFIX] Add missing fields in functional tests fixtures

Add value to the language_isocode column for sys_language fixture
and CType for tt_content fixture.

Resolves: #79790
Releases: master
Change-Id: I2d83d436c495bc2a8174527f34610880f8a0f9ea
Reviewed-on: https://review.typo3.org/51661


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Thomas Hohn <thomas@hohn.dk>
Reviewed-by: Philipp Gampe <philipp.gampe@typo3.org>
Reviewed-by: Thomas Löffler <thomas.loeffler@typo3.org>
Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>