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GH-39425: [CI] Fix import to match new substrait repo structure (#39426)

### Rationale for this change

Upstream substrait repo did a small refactor. We have to update our imports to match the new structure.

### What changes are included in this PR?

Update import

### Are these changes tested?
Via archery

### Are there any user-facing changes?
No
* Closes: #39425

Authored-by: Raúl Cumplido <raulcumplido@gmail.com>
Signed-off-by: Raúl Cumplido <raulcumplido@gmail.com>