[SWDEV-529030/SWDEV-531217] Fix tests & output for partitioned configurations (CPX, DPX, QPX, etc.)

Changes:
  - Updated AMD SMI firmware to display "N/A" for unavailable firmware in partitioned environments, improving clarity.
    Example (in DPX):
    $ amd-smi firmware
    GPU: 0
        FW_LIST:
            ...
            FW 12:
                FW_ID: PM
                FW_VERSION: 00.86.39.00
    GPU: 1
        FW_LIST: N/A
  - Fixed amd-smi partition not showing current partition information on
    asics with inablity to set memory or accelerator partitions.
    $ amd-smi partition -c -m
    CURRENT_PARTITION:
    GPU_ID  MEMORY  ACCELERATOR_TYPE  ACCELERATOR_PROFILE_INDEX  PARTITION_ID
    0       NPS1    CPX               2                          0
    1       N/A     N/A               N/A                        1
    2       N/A     N/A               N/A                        2
    3       N/A     N/A               N/A                        3
    4       N/A     N/A               N/A                        4
    5       N/A     N/A               N/A                        5
    6       NPS1    SPX               0                          0
    7       NPS1    SPX               0                          0
    8       NPS1    SPX               0                          0

    MEMORY_PARTITION:
    GPU_ID  MEMORY_PARTITION_CAPS  CURRENT_MEMORY_PARTITION
    0       N/A                    NPS1
    1       N/A                    N/A
    2       N/A                    N/A
    3       N/A                    N/A
    4       N/A                    N/A
    5       N/A                    N/A
    6       N/A                    NPS1
    7       N/A                    NPS1
    8       N/A                    NPS1

  - Refactored amd_smi_drm_example.cc:
    - Grouped partition changes and restores original partition settings.
    - Now handles partitioned environments allowing example to continue even if some APIs are not supported in partitioned configurations.
  - Modified amdsmi_asic_info_t (see amdsmi_get_gpu_asic_info()) to report OAM ID as N/A if 0xFFFFFFFF (was 0xFFFF).
    Allows for better handling of OAM IDs in partitioned environments (DNE for non-primary nodes,
    since its a physical identifier). Easier to handle in tests and example code (ie. now consistent w/ max size of the structure's value).
  - Introduced amdsmi_RAII_open_FD() (internal API) to manage file descriptors using RAII, ensuring proper closure and preventing resource leaks.
    Updated the following APIs to use this function:
      - amdsmi_get_gpu_asic_info(), amdsmi_get_gpu_vram_usage(),
        amdsmi_get_gpu_vram_info(), amdsmi_get_gpu_vbios_info(),
        amdsmi_get_gpu_driver_info(), amdsmi_get_gpu_virtualization_mode()
  - Updated AMD SMI test_base.cc/.h:
    - Improved output and handling for partitioned environments.
    - Added detailed ASIC information logging to align with structure changes.
    - Enhanced error messages for better context before ASSERT checks.
  - Resolved test failures in partitioned environments by updating
    logic and handling for partition-specific configurations.
    Fixed tests include:
      - computepartition_read_write.cc, frequencies_read_write.cc,
        gpu_metrics_read.cc, mem_util_read.cc, memorypartition_read_write.cc,
        perf_level_read.cc, perf_level_read_write.cc, power_cap_read_write.cc,
        power_read.cc, sys_info_read.cc, gpu_busy_read.cc

Change-Id: I36e903f8fddd714c74c719459c71aba8bbb77e6f
Signed-off-by: Charis Poag <Charis.Poag@amd.com>

Resetting head + adding fixes for tests ran in partitions

Change-Id: I0c1e9ac07488b50c95f3bc6d8a724e67d2c715dc
Signed-off-by: Charis Poag <Charis.Poag@amd.com>

include/amd_smi/amdsmi.h

@@ -845,7 +845,7 @@ typedef struct {
     uint64_t device_id;    //!< The device ID of a GPU
     uint32_t rev_id;       //!< The revision ID of a GPU
     char asic_serial[AMDSMI_MAX_STRING_LENGTH];
-    uint32_t oam_id;       //!< 0xFFFF if not supported
+    uint32_t oam_id;       //!< 0xFFFFFFFF if not supported
     uint32_t num_of_compute_units;     //!< 0xFFFFFFFF if not supported
     uint64_t target_graphics_version;  //!< 0xFFFFFFFFFFFFFFFF if not supported
     uint32_t subsystem_id; //!> The subsystem ID

include/amd_smi/impl/amd_smi_utils.h

@@ -29,6 +29,7 @@
 #include <string>
 #include <utility>
 #include <functional>
+#include <memory>
 
 #include "amd_smi/amdsmi.h"
 #include "amd_smi/impl/amd_smi_gpu_device.h"
@@ -58,6 +59,24 @@ std::string smi_split_string(std::string str, char delim);
 std::string smi_amdgpu_get_status_string(amdsmi_status_t ret, bool fullStatus);
 amdsmi_status_t smi_clear_char_and_reinitialize(char buffer[], uint32_t len,
                                                     std::string newString);
+
+/**
+ * @brief Opens a file descriptor for the specified path with RAII semantics and caching.
+ *
+ * This function attempts to open a file descriptor (FD) for the given file path and flags.
+ * It maintains a cache of weak pointers to previously opened FDs, allowing for reuse of
+ * file descriptors if they are still valid. If a valid FD for the path exists in the cache,
+ * it is reused; otherwise, a new FD is opened. The returned FD is managed by a std::shared_ptr
+ * with a custom deleter that ensures the FD is properly closed when no longer in use.
+ *
+ * Thread safety is ensured via a static mutex.
+ *
+ * @param path The file system path to open.
+ * @param flags Flags to use when opening the file (as per open(2)).
+ * @return std::shared_ptr<int> Shared pointer managing the file descriptor, or nullptr on failure.
+ */
+std::shared_ptr<int> amdsmi_RAII_FD_handler(const std::string& path, int flags);
+
 /**
  * @brief Wait for user input, a debugging function to pause the program
  *