Update version error message

Update version error message to match the minimum support UCX version
and provide instructions to check where UCX is being loaded from.

ucp/__init__.py

@@ -108,10 +108,13 @@ def _is_mig_device(handle):
     os.environ["UCX_PROTO_ENABLE"] = "n"
 
 
+__ucx_min_version__ = "1.15.0"
 __ucx_version__ = "%d.%d.%d" % get_ucx_version()
 
-if get_ucx_version() < (1, 15, 0):
+if get_ucx_version() < tuple([int(i) for i in __ucx_min_version__.split(".")]):
     raise ImportError(
         f"Support for UCX {__ucx_version__} has ended. Please upgrade to "
-        "1.11.1 or newer."
+        f"{__ucx_min_version__} or newer. If you believe the wrong version "
+        "is being loaded, please check the path from where UCX is loaded "
+        "by rerunning with the environment variable `UCX_LOG_LEVEL=debug`."
     )