Add Valgrind suppression file and integrate into test script

Created a `valgrind.supp` file to suppress specific known issues during memory checks. Updated the test script to utilize this suppression file in the Valgrind command, improving test reliability and reducing false positives.

Author: allnes

scripts/run_tests.py

@@ -30,7 +30,10 @@ def __init__(self):
         self.__ppc_num_proc = None
         self.__ppc_env = None
         self.work_dir = None
-        self.valgrind_cmd = "valgrind --error-exitcode=1 --leak-check=full --show-leak-kinds=all"
+
+        suppression_file = Path(self.__get_project_path()) / "valgrind.supp"
+        self.valgrind_cmd = (f"valgrind --suppressions={suppression_file} "
+                             f"--error-exitcode=1 --leak-check=full --show-leak-kinds=all")
 
         if platform.system() == "Windows":
             self.mpi_exec = "mpiexec"

valgrind.supp

@@ -0,0 +1,7 @@
+{
+   hwloc_still_reachable
+   Memcheck:Leak
+   match-leak-kinds: reachable
+   fun:malloc
+   obj:/usr/lib/x86_64-linux-gnu/libhwloc.so.*
+}