[BUGFIX] Don't show newLanguageButton if user has no edit permissions

With #90608 the PageLayoutView was extended to also
take `tables_modify` for `tt_content` into account.

Unfortunately the newLanguageButton was forgotten,
which also needs to be checked regarding proper edit permissions,
as without these, translating a `tt_content` record is not possible.

Resolves: #90632
Related: #90608
Releases: master
Change-Id: Ia6f2ff02dbc3cda09a40fb5d22d9b7b9ef56c58f
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63547


Tested-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Susanne Moog <look@susi.dev>
Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Reviewed-by: Susanne Moog <look@susi.dev>