[Bug fix] Add input data type checking in BF16 placement pass #38702
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Bug fixes
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Describe
This PR adds checking input data type in cpu_bfloat16_placement_pass. The bfloat16 system supports conversion only from float32 to bfloat16, when the input data type is different operator shouldn't use the bfloat16 data type. This PR resolves the issue #38687.