FEAT-#7249: Add reload_modin feature (#7280)

Signed-off-by: Igoshev, Iaroslav <iaroslav.igoshev@intel.com>

modin/utils.py

@@ -944,3 +944,17 @@ def __init__(self, func: Any):
 
     def __get__(self, instance: Any, owner: Any) -> Any:  # noqa: GL08
         return self.fget(owner)
+
+
+def reload_modin() -> None:
+    """
+    Reload all previously imported Modin modules.
+
+    The call to this function is required
+    if an execution engine has been shut down and
+    is going to be started up once again.
+    """
+    modules = sys.modules.copy()
+    for name, module in modules.items():
+        if name.startswith("modin"):
+            importlib.reload(module)