regression in thread-safety correctness of detecting compilation finished

[vtjnash]

The ci_has_abi uses monotonic loads, so #53219 introduced a data-race here. I think it needs an :acquire on one or move of these to fix that, so that it must observe this being set. And also needs to switch the order of the checks, so that it correctly pairs with the release store.

Originally posted by @vtjnash in #53219 (comment)

Posting as an issue since the PR is already merged, so this doesn't get lost

[vtjnash]

Fixed in #56880 which added acquire annotation in ci_has_abi and fixed the order of statements