Fix: Correct backward convolution function call with output mask

[guozixu2001]

Motivation and Context

This change addresses a performance issue where unnecessary gradients were being computed in the convolution_backward function. Computing gradients that are not needed can be time-consuming. By introducing a dynamic output_mask, this update ensures that only the required gradients are computed, leading to significant time savings and improved overall performance.

Description

• Introduced std::array<bool, 3> output_mask to selectively compute only the necessary gradients in the convolution_backward function.
• Modified the function to set output_mask based on the presence of grad_input and grad_weight. If either is not needed, the corresponding gradient computation is skipped.
• Updated the call to at::native::convolution_backward.

Use cases (Optional)

BC-breaking (Optional)

Checklist

Before PR:

• I have read and followed the workflow indicated in the Contributors.md to create this PR.
• Pre-commit or linting tools indicated in Contributors.md are used to fix the potential lint issues.
• Bug fixes are covered by unit tests, the case that causes the bug should be added in the unit tests.
• New functionalities are covered by complete unit tests. If not, please add more unit test to ensure the correctness.
• The documentation has been modified accordingly, including docstring or example tutorials.

After PR:

• CLA has been signed and all committers have signed the CLA in this PR.