Google tests and Updated Github Actions

[JananiPSrinivasan]

Google tests are implemented along with the updated Github actions workflow.

[jbrzensk]

@cpaolini From our meeting, you are going to call them "testn", not "testn_gtest"

[cpaolini]

Correct. We will remove the _gtest substring in the filename.

[JananiPSrinivasan]

@jbrzensk @cpaolini
I have renamed the files to "testsn", verified the build after renaming and pushed the code to the branch again. Kindly review.

[jbrzensk]

Changes are good.
The build fails the checks/actions.

test1.cpp:2:10: fatal error: gtest/gtest.h: No such file or directory
    2 | #include <gtest/gtest.h>
      |          ^~~~~~~~~~~~~~~
compilation terminated.
make[1]: *** [Makefile:[31](https://github.com/csrc-sdsu/mole/actions/runs/13440527158/job/37553556545?pr=71#step:5:32): test1] Error 1
make[1]: Leaving directory '/home/runner/work/mole/mole/tests/cpp'
make: *** [Makefile:17: tests/cpp] Error 2
Error: Process completed with exit code 2.

[JananiPSrinivasan]

Check Failure Reason

• C/C++ CI workflow fails in this PR because the test cases which ran with the old makefile and has been removed
• C/C++ CI workflow does not include the library for gtest framework
• Checks initially passed because we had both the test files required to pass the C/C++ CI workflow and the Build and Test workflow, but now it has been removed and hence the error
• Build and Test workflow has handled the gtest framework issue.
  After this PR has been merged, the C/C++ CI workflow is to be taken down as they do not include gtest framework and it supports the old test case files

@jbrzensk @cpaolini