[TASK] Remove inline styles from parsed blockquote tag

The inline styles were removed from CSS Styled Content
but not in Fluid Styled Content.

Now this is also removed in EXT:fluid_styled_content.

Releases: master
Resolves: #80171
Change-Id: I91343b803d6da0b651b6984c8c94c2583730aa40
Reviewed-on: https://review.typo3.org/52059


Reviewed-by: Josef Glatz <josef.glatz@typo3.org>
Tested-by: Josef Glatz <josef.glatz@typo3.org>
Reviewed-by: Benjamin Kott <benjamin.kott@outlook.com>
Tested-by: Benjamin Kott <benjamin.kott@outlook.com>