Allow Int32 indices, switch to SS7 (#380)

* init, needs further tests and conversions

* IndexTypes

* a couple updates

* attempt to get tests passing for SPQR Int32

* remove check on Int64 for CHOLMOD, might work?

* typo

* fix doctest

* revert changes to Int64 on 32-bit plats

* rm Int fix

* import adj_or_trans

* regenerate headers

* add tests fix calls

* fix doctest

* itype correction for Int32 plats

---------

Co-authored-by: Viral B. Shah <ViralBShah@users.noreply.github.com>

Author: rayegun

gen/Manifest.toml

@@ -1,5 +1,5 @@
 [general]
-library_names = {"SuiteSparse_config.h" = "libsuitesparseconfig", "SuiteSparseQR_C.h" = "libspqr", "umfpack.h" = "libumfpack", "cholmod.h" = "libcholmod"}
+library_names = {"SuiteSparse_config.h" = "libsuitesparseconfig", "SuiteSparseQR_C.h" = "libspqr", "umfpack.h" = "libumfpack", "cholmod.h" = "libcholmod", "amd.h" = "libamd"}
 
 use_julia_native_enum_type = true
 use_deterministic_symbol = true