[Bug Report] Incorrect output When Using Mixed uint8 and bfloat16 Formats in Compute Kernel

[ilkoo-lee]

Describe the bug
We discovered a new bug while investigating issue #11962.
I found that the output results are incorrect when mixing bfloat16 and uint8 in the compute kernel while using them in the CB and DST registers.

To Reproduce
branch : ilkoo/uint8_dst_reg

compute kernel : https://github.com/tenstorrent/tt-metal/blob/ilkoo/uint8_dst_reg/ttnn/cpp/ttnn/deprecated/tt_dnn/op_library/moreh_test2/kernels/moreh_test2.cpp

To reproduce the error, run the following command from the ilkoo/uint8_dst_reg branch:
pytest tests/tt_eager/python_api_testing/unit_testing/misc/test_moreh_test2.py

This branch includes the changes from rd/stall_unpack_reconfig.

It does not occur when mixing float32 and uint8.

Expected behavior
The expected output (PASSED) should be produced.