Fix rustc-pull CI workflow

[Kobzol]

See rust-lang/josh-sync#40.

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[Kobzol]

The CI failure looks unrelated, probably will need some other fix.

[sayantn]

the tests are failing because the fix in rust-lang/rust#154043 didn't yet propagate to this repo - it requires a sync job

[folkertdev]

Yes but the sync job is blocked on this PR :)

And also on a hexagon libc issue, that needs to be resolved in the main repo first. So, we're blocked for now.

[sayantn]

Yes but the sync job is blocked on this PR :)

And also on a hexagon libc issue, that needs to be resolved in the main repo first. So, we're blocked for now.

😕 so does this mean we would need infra admins to step in and perform a manual sync?

[folkertdev]

I've just cherry-picked the commit here onto the sync, that should work if not for the hexagon build issue. So we'll just have to wait a bit.

[tgross35]

I mentioned in the libc discussion but you should probably drop the Hexagon job for now if it's blocking things. T3 targets are absolutely not consistently tested across rust-lang (nor should they be) so if you've accepted a CI job testing any of them in this repo, you need to be ready to do that. Or at the very least, mark it continue-on-error.

Looks like the nvptx job is the one failing though?

[folkertdev]

cherry-picked into #2067