test(ivy): move pipe tests into acceptance

[crisbeto]

Moves over the tests from pipe_spec into acceptance. Note that the two WrappedValue tests haven't been moved over, because impure pipes always throw "changed after checked" errors in TestBed. This seems to be consistent with ViewEngine.

[kara]

LGTM

[ngbot]

I see that you just added the PR action: merge label, but the following checks are still failing:
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[kara]

merge assistance: size flake

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