HPCC-9329 Add text search test cases into CE regression suite

Add the files testing text search and global smart stepping into the standard
regression suite. To enable these tests, need to add a line to regress.ini
indicating the location of the test files.

Adding the following line to regress.ini worked for me:

setup_file_location=.::files

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>
Merge pull request #4379 from richardkchapman/textsearch-regression-tests

HPCC-9329 Add text search test cases into CE regression suite

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>