HPCC-10522 Regression Suite --timeout and --pq (parallel query) parameters
don't documented well

Add more detail to README.rst and the built in help too.

Signed-off-by: Attila Vamos <attila.vamos@gmail.com>
HPCC-10522 Regression Suite --timeout and --pq (parallel query) parameters
don't documented well

Update after review.

Signed-off-by: Attila Vamos <attila.vamos@gmail.com>
Merge pull request #5200 from AttilaVamos/HPCC-10522-improvement

HPCC-10522 Regression Suite --timeout and --pq (parallel query) parameters don't documented well

Reviewed-By: Richard Chapman <rchapman@hpccsystems.com>