[SWDEV-451960] [WIP] Add Pytest

Updates:
- Added pytest to shared/pytest folder
- User can execute tests:

[pytest]
python3 -m pytest -p no:cacheprovider /opt/rocm/share/amd_smi/tests/pytest/unit_tests.py -s -v
python3 -m pytest -p no:cacheprovider /opt/rocm/share/amd_smi/tests/pytest/integration_test.py -s -v

[unittest]
/opt/rocm/share/amd_smi/tests/pytest/unit_tests.py -v
/opt/rocm/share/amd_smi/tests/pytest/integration_test.py -v

- Automatically installs pytest

Change-Id: Ia3281a9608aeeb803b91f8b83f87ff84b01037f4
Signed-off-by: Charis Poag <Charis.Poag@amd.com>

CMakeLists.txt

@@ -187,9 +187,10 @@ if(BUILD_TESTS)
     add_subdirectory("tests/amd_smi_test")
 endif()
 
-# python interface and CLI depend on shared libraries
+# python interface, CLI, and py-test depend on shared libraries
 if(BUILD_SHARED_LIBS)
     add_subdirectory("py-interface")
+    add_subdirectory("pytest")
     if(BUILD_CLI)
         add_subdirectory("amdsmi_cli")
     endif()