[Bug] CK GeMM correctness bug

[chhwang]

Describe the bug
test_matmul_fp32 and test_matmul_fp16_split fails on MI300x.

To Reproduce
Run the unit test.

Expected behavior
max_diff should be lower than the calculated value.

System (please complete the following information):

• MI300x
• Single-GPU

Additional context

[Binyang2014]

test_matmul_fp16_split is caused by program logical issue.
When we split the output tensor and input tensor, due to input tensor cannot match the tile size, it will be padded input another shape. Then the results for each part will overwrite the same output region.