ROCm MHA (#15279)
Add MultiHeadAttention for ROCm EP.
**Before:**
```
'engine': 'onnxruntime'
'version': '1.15.0'
'height': 512
'width': 512
'steps': 50
'batch_size': 1
'batch_count': 5
'num_prompts': 1
'average_latency': 3.878769588470459
'median_latency': 3.8792178630828857
'first_run_memory_MB': -1
'second_run_memory_MB': -1
'model_name': 'runwayml/stable-diffusion-v1-5'
'directory': './sd-v1-5-onnx-fp16-nomha'
'provider': 'ROCMExecutionProvider'
'disable_safety_checker': True
```
**After:**
```
'engine': 'onnxruntime'
'version': '1.15.0'
'height': 512
'width': 512
'steps': 50
'batch_size': 1
'batch_count': 5
'num_prompts': 1
'average_latency': 2.364924430847168
'median_latency': 2.3650705814361572
'first_run_memory_MB': -1
'second_run_memory_MB': -1
'model_name': 'runwayml/stable-diffusion-v1-5'
'directory': './sd-v1-5-onnx-fp16'
'provider': 'ROCMExecutionProvider'
'disable_safety_checker': True
```
