hifi conv1d fixes (#18626)

[rezaasjd]

Summary:

Fixes the dilation, stride and padding 0 indexing instead of last element.

Reviewed By: mcremon-meta

Differential Revision: D98941393

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/18626

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✅ You can merge normally! (2 Unrelated Failures)

As of commit 415be0e with merge base b24535b ():

FLAKY - The following job failed but was likely due to flakiness present on trunk:

• pull / unittest-editable / windows / windows-job (gh) (matched win rule in flaky-rules.json)
  ##[error]The operation was canceled.

BROKEN TRUNK - The following job failed but was present on the merge base:

👉 Rebase onto the `viable/strict` branch to avoid these failures

• pull / unittest / windows / windows-job (gh) (trunk failure)

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[meta-codesync]

@rezaasjd has exported this pull request. If you are a Meta employee, you can view the originating Diff in D98941393.

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