driver: Add a zplgtr in order to initiate trapezoidal matrix with the std api

zplgsy/zplghe standard API to not allow for initialization of non triangular matrices.

Instead of changing the interface, we propose to add a new interface that internally calls pzplgsy to generated trapezoidal matrices.

@all Please approve or comment. I'll merge it if I get multiple approval.

cmake_modules/local_subs.py

@@ -24,6 +24,7 @@ _extra_blas = [
     ('',                     'spocon',               'dpocon',               'cpocon',               'zpocon'              ),
     ('',                     'strasm',               'dtrasm',               'ctrasm',               'ztrasm'              ),
     ('',                     'sgecfi',               'dgecfi',               'cgecfi',               'zgecfi'              ),
+    ('',                     'splgtr',               'dplgtr',               'cplgtr',               'zplgtr'              ),
     ('',                     'splrnk',               'dplrnk',               'cplrnk',               'zplrnk'              ),
     ('',                     'splssq',               'dplssq',               'cplssq',               'zplssq'              ),
     ('',                     'sy2sb',                'sy2sb' ,               'he2hb',                'he2hb'               ),