Test PECL igbinary ext in nightly

[mvorisek]

igbinary ext is very popular and more popular than some extensions already tested.

[mvorisek]

Should pass CI after the latest changes to the igbinary repo.

[remicollet]

Should pass CI after the latest changes to the igbinary repo.

igbinary is still not compatible with 8.5.0RC1
25 failed tests, mostly because of __sleep, __wakeup, report_memleaks deprecations

[nielsdos]

The sleep and wakeup deprecations will be fixed most likely as https://wiki.php.net/rfc/soft-deprecate-sleep-wakeup will likely pass.
I'd then prefer to wait until igbinary/igbinary#399 is merged

[iluuu1994]

IMO, this build has not paid off. The only errors we have caught were known API breaks, which are always annoying to deal with, having to ping upstream maintainers and temporarily disabling builds. I'd honestly rather drop the whole thing, and especially not add more extensions that are not super well maintained.

[Girgias]

I think that this build should be moved to a different repo, and maybe even run on a weekly basis rather than nightly, as API break impact are useful, but it shouldn't be breaking our builds...

[mvorisek]

I'd then prefer to wait until igbinary/igbinary#399 is merged

The PR has been merged.

IMO, this build has not paid off...

I think that this build should be moved to a different repo...

igbinary ext is very popular and more popular than some extensions already tested.

I would be happy if this PR can be merged as is and if these extensions are wanted to be tested in "weekly", then they can be moved together at once.