Add a new test case in pjrt_util_test
Add a new test case in pjrt_util_test

FUTURE_COPYBARA_INTEGRATE_REVIEW=https://github.com/tensorflow/tensorflow/pull/66087 from Intel-tensorflow:amin/int8-fp32-matmul-fusion bfe2973e107bd6aaa12c29a3204a9b59ed018440
