[QNN EP] Enable Conv Op with "auto_pad" param set as VALID (#25444)
Enable Conv Op and ConvTranspose Op with "auto_pad" param set as VALID
### Description
QNN_EP reject the Conv Op and ConvTranspose on HTP if "auto_pad" is
"VALID". This configuration is supported on HTP.
### Motivation and Context
To enable Conv and ConvTranspose op with auto_pad as "VALID" running on
NPU and prevent them from falling back to CPU.