Set exe as default component for cabal run and cabal list-bin

[dminuoso]

Resolves #7403

The modification was tested against https://github.com/dminuoso/cabal-repro and the added integration test.

Documentation will be updated tomorrow.

---

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[Mikolaj]

@dminuoso, @emilypi, @fgaz: who could review in addition to me? Better sooner rather than later to avoid wasting additional author's effort in case I have mixed things up and the spec (in the original issue) makes no sense, e.g., there was some important purpose for the old behaviour.

[fgaz]

I did not test it, but the code looks good! I like how the names are more consistent now

[Mikolaj]

@dminuoso: the topic starts with [WIP] --- is it ready for final review and merge in your opinion? Do you need any extra help?

[dminuoso]

@Mikolaj Hi, I was waiting for @phadej to weigh in on #7403 (comment)

But we can merge this already if you like. If phadej agrees to align list-bin with run wrt to implicit packages, I can make a separate PR.

[Mikolaj]

@phadej, could you weigh in? :)

[Mikolaj]

I'm afraid we need to make do with our own weight. What are you opinions? @dminuoso, @fgaz, others?

[fgaz]

Well, whatever the choice for list-bin is, we can merge this anyway, no?

[Mikolaj]

LGTM.

I guess a changelog entry wouldn't hurt, though one can argue this is neither a surprising nor crucial change to how cabal operates.

[Mikolaj]

Ugh, CI apparently got stuck and so the PR got stuck. Let me try to move this forward.

[Mikolaj]

@Mergifyio rebase

[mergify]

rebase

✅ Branch has been successfully rebased

[Mikolaj]

Phew, it seems, this didn't bit-rot. I'm letting mergify merge. Last moment to object.

@dminuoso, @fgaz: thank you!