[BUGFIX] Split jQuery and DataTables into separate files

This patch removes the combined jQuery file and adds two separate files
for the main jQuery library and the plugin DataTables.

Fixes: #40498
Releases: 6.0

Change-Id: I9b75597c7183e1a620a036420f2c3841f7a62ec5
Reviewed-on: http://review.typo3.org/15500
Reviewed-by: Wouter Wolters
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn