Reapply "Switch Vert.x HTTP to @ConfigMapping"

[gsmet]

This reverts commit 5f90f04 and reapply the Switch Vert.x HTTP to @ConfigMapping change.

This was originally written by Roberto, it conflicted all around with all the new changes that got in so it was a lot of fun rebasing :)

@radcortez I don't know if you remember but this change broke quite a lot of extensions out there. I wonder if we should apply the same trick and have the interface with a new name and keep the old config as deprecated with maybe only the ports? I think if we keep the compatibility for the ports, we fix 99% of the breaking change. We might need to add a few more such as rootPath but I would rather be conservative and get the feedback from Ecosystem CI first.

Note that I will have a look at the consequences of this change this afternoon so that we hopefully don't have to revert later.

Fixes #44115

[github-actions]

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[radcortez]

I was already working on it but didn't have a PR yet:
radcortez@5159607

Mainly because I was working out some SR Config improvements to compensate some of the extra work:
smallrye/smallrye-config#1273

I have a couple of other ideas for improving things.

@radcortez I don't know if you remember but this change broke quite a lot of extensions out there. I wonder if we should apply the same trick and have the interface with a new name and keep the old config as deprecated with maybe only the ports? I think if we keep the compatibility for the ports, we fix 99% of the breaking change. We might need to add a few more such as rootPath but I would rather be conservative and get the feedback from Ecosystem CI first.

Yes, we need to keep the old configs for ports and rootPath to avoid major breakage.

[gsmet]

@radcortez so do you prefer I close this one? Sorry, I thought it would be a good holiday project when everything was quiet :).

[radcortez]

@radcortez so do you prefer I close this one? Sorry, I thought it would be a good holiday project when everything was quiet :).

No worries. We can use this one. Let's nail some of the performance improvements first.

[gsmet]

We can close this as we have another PR going on: #45769