[SWDEV-531904] Unit and Integ Test Updates (#563)

* [SWDEV-531904] Unit and Integ Test Updates
Updated: unit_tests.py
- Removed redundant self.setUp() and self.tearDown() calls.
- Removed test_free_name_value_pairs() since is internal only.
Updated: integration_test.py
- Added logic to set AMDSMI_CLI_PATH from environment or default.
- Raise FileNotFoundError if path does not exist.
- Append CLI path to sys.path and handle ImportError with a clear message.
- Removed redundant @handle_exceptions function decorator.
- Removed redundant self.setUp() and self.tearDown() calls.
Updated: amdsmi_interface.py
- Removed POINTER conversion in amdsmi_get_gpu_pm_metrics_info() and amdsmi_get_gpu_reg_table_info()

All tests pass/skip

Signed-off-by: Juan Castillo <juan.castillo@amd.com>

* Update tests/python_unittest/integration_test.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Signed-off-by: Castillo, Juan <Juan.Castillo@amd.com>

* Review Update 1
Modified: integration_test.py
- Added logic to properly loop through firmware list and display each name and version

Signed-off-by: Juan Castillo <juan.castillo@amd.com>

* Skip xgmi_err tests + improve running output

Changes:
1. Now check for elevated permissions
2. Skip xgmi_error related SYSFS tests, refer to xgmi_read_write.cc
   (both are skipped)
3. Added list of tests and provided a summary of additional output
   provided

Change-Id: Iefc85c270faad89c625e2bd7af397d24faed2437
Signed-off-by: Charis Poag <Charis.Poag@amd.com>

---------

Signed-off-by: Juan Castillo <juan.castillo@amd.com>
Signed-off-by: Castillo, Juan <Juan.Castillo@amd.com>
Signed-off-by: Charis Poag <Charis.Poag@amd.com>
Co-authored-by: Juan Castillo <juan.castillo@amd.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Co-authored-by: Charis Poag <Charis.Poag@amd.com>

[ROCm/amdsmi commit: 67eb541c15]

projects/amdsmi/py-interface/amdsmi_interface.py

@@ -2144,7 +2144,7 @@ def amdsmi_get_gpu_pm_metrics_info(
 
     _check_res(
         amdsmi_wrapper.amdsmi_get_gpu_pm_metrics_info(
-            processor_handle, POINTER(pm_metrics), ctypes.byref(num_mets)
+            processor_handle, pm_metrics, ctypes.byref(num_mets)
         )
     )
 
@@ -2173,7 +2173,7 @@ def amdsmi_get_gpu_reg_table_info(
 
     _check_res(
         amdsmi_wrapper.amdsmi_get_gpu_reg_table_info(
-            processor_handle, reg_type, POINTER(reg_metrics), ctypes.byref(num_regs)
+            processor_handle, reg_type, reg_metrics, ctypes.byref(num_regs)
         )
     )