Enable and fix Catch test

[learning-chip]

Enabling unit test would help capture bugs like #5, and also allow better validation of new functionalities like https://github.com/sympiler/sympiler/issues/7 . This PR is just to enable the existing test sptrsv_tests.cpp; will add more tests in later PRs.

Currently the Catch test target is commented out:

https://github.com/sympiler/aggregation/blob/da104fa343672469f2000efa4285dccb32107370/CMakeLists.txt#L151-L153

Uncommenting the lines leads to compile errors with gcc-11.3:

[ 98%] Building CXX object Catch_tests/CMakeFiles/Catch_tests.dir/sptrsv_tests.cpp.o
In file included from /usr/include/signal.h:328,
                 from /work/Catch_tests/catch.hpp:7712,
                 from /work/Catch_tests/sptrsv_tests.cpp:7:
/work/Catch_tests/catch.hpp:10453:58: error: call to non-'constexpr' function 'long int sysconf(int)'
10453 |     static constexpr std::size_t sigStackSize = 32768 >= MINSIGSTKSZ ? 32768 : MINSIGSTKSZ;
      |                                                          ^~~~~~~~~~~
In file included from /usr/include/x86_64-linux-gnu/bits/sigstksz.h:24,
                 from /usr/include/signal.h:328,
                 from /work/Catch_tests/catch.hpp:7712,
                 from /work/Catch_tests/sptrsv_tests.cpp:7:
/usr/include/unistd.h:640:17: note: 'long int sysconf(int)' declared here
  640 | extern long int sysconf (int __name) __THROW;
      |                 ^~~~~~~
In file included from /work/Catch_tests/sptrsv_tests.cpp:7:
/work/Catch_tests/catch.hpp:10512:45: error: size of array 'altStackMem' is not an integral constant-expression
10512 |     char FatalConditionHandler::altStackMem[sigStackSize] = {};
      |                                             ^~~~~~~~~~~~
gmake[2]: *** [Catch_tests/CMakeFiles/Catch_tests.dir/build.make:104: Catch_tests/CMakeFiles/Catch_tests.dir/sptrsv_tests.cpp.o] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:334: Catch_tests/CMakeFiles/Catch_tests.dir/all] Error 2
gmake: *** [Makefile:91: all] Error 2

Updating to the latest Catch v2.13.10 solves the bug. Still using the single-header v2 branch of Catch, not yet changing to the multi-header v3 branch.

Also changed the include files from Sparse_BLAS_INC to Sparse_TRSV_INC, and Sparse_BLAS_SRC_FILES to Sparse_TRSV_SRC_FILES, since the former is not defined elsewhere even in the parent Sympiler repo.

[learning-chip]

The unit tests should also run within github workflows for automatic CI. Currently only the demo examples get run, which is not sufficient for validating advanced features.

[cheshmi]

Thank you, adding test to the flow was on my long list.