Introduce new optimizer Pad + Conv/MaxPool (#18136) (#18374)

[Cherry Pick Reviewed]
### Description
Introducing new L1 optimizer to fuse Pad to it's child node if the child
node is Conv or MaxPool.

Pad -> Conv = Conv
Pad -> MaxPool = MaxPool

Major Conditions:
- It will only fuse for the `Constant` mode of padding.
- Conv/MaxPool should not have optional `indices` output tensor
- Padding value for non-spatial dimensions should be zero and for
spatial dimensions padding values should be positive for `pad` operator.

For other conditions please see `SatisfyCondition()` in `pad_fusion.cc`.

### Motivation and Context
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### Description
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### Motivation and Context
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Co-authored-by: Sumit Agarwal <[email protected]>