[FEATURE] Exclude Page CSS from Concatenation

CSS added via _CSS_PAGE_STYLE is no longer included in
the concatenated css files. It can be written in an external
file or as inline block (depending on inlineStyle2TempFile).

Additionally the config.compressCss setting is now taken into
account.

Resolves: #61993
Releases: master

Change-Id: I0c9cc6ababbd5695b0dab26e7d421f28b5f73bb0
Reviewed-on: http://review.typo3.org/33098


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Susanne Moog <typo3@susannemoog.de>
Tested-by: Susanne Moog <typo3@susannemoog.de>