isl_pw_*_gist*: remove duplicate parameter alignment
isl_pw_*_gist*: remove duplicate parameter alignment

The duplicate alignment (both inside and outside of isl_pw_*_gist_aligned)
was introduced in isl-0.07-18-g890e13b448 (align parameters of arguments
to binary isl_map and isl_pw_aff functions, Wed Jul 20 10:06:21 2011 +0200).
isl-0.22-54-g20d3574057 (perform parameter alignment by modifying
both arguments to function, Fri Dec 6 16:08:56 2019 +0100)
only replaced the outside alignment by a call to isl_pw_*_align_params_set.
Move the call inside, replacing the inside alignment and
change the name of isl_pw_*_gist_aligned accordingly.

Signed-off-by: Sven Verdoolaege <dd860110a62b19214c4ee03aec0abffecb4e86b8@cerebras.net>

Meinersbur/isl,Meinersbur/isl,Meinersbur/isl,Meinersbur/isl