Add a NumPy version check to `examples/thread_block_cluster.py`

[leofang]

As noted in #1168, this test needs NumPy v2.2.5+.

[leofang]

This one seems to be my oversight back in #868.

[leofang]

We just need to add something like this to the example:

cuda-python/cuda_core/examples/memory_ops.py

Lines 28 to 30 in 20f29e9

	if np.__version__ < "2.1.0":
	print("This example requires NumPy 2.1.0 or later", file=sys.stderr)
	sys.exit(0)