DM-48980: Update ctrl_mpexec imports to pipe_base.

[TallJimbo]

No description provided.

[TallJimbo]

@hsinfang & @kfindeisen , this is ready to merge at your convenience. It shouldn't need to be merged to avoid breakage (just deprecation warnings), and you definitely don't want to merge it until you're running against the upstream changes. Tests pass locally for me, and I assume the GHA failure is expected when the upstream changes aren't in the container you're using yet.

[kfindeisen]

Given recent experience, we'll want to run integration tests first. Which version is supposed to be compatible? d_2025_07_30?

[TallJimbo]

Yes, d_2025_07_30 should be the first with the upstream changes.

[hsinfang]

Yesterday the default base was updated from d_2025_07_29 to d_2025_08_05. I'm going to rebase this ticket branch, run integration tests, and merge if tests go well.

[hsinfang]

All good in testing. Merging next.