Improve path readability check (#2967)

On modern system e.g. render nodes are made accessible via the udev
uaccess functionality, which adds the logged in user to the ACL of the
device. This means just checking for user and group is bound to give
false positives. Instead use os.access as a first check

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

projects/amdsmi/amdsmi_cli/amdsmi_helpers.py

@@ -1358,6 +1358,11 @@ class AMDSMIHelpers():
         if os.geteuid() == 0:
             return True, None, None
 
+        # Use os.access to check read permission (including ACLs), so that
+        # permissions granted via mechanisms like udev/uaccess are respected.
+        if os.access(path, os.R_OK):
+            return True, None, None
+
         mode = st.st_mode
         uid = st.st_uid
         gid = st.st_gid