There's a merged pull request on the void-packages repository

Imath 3.1.9 + Openexr 3.1.9.
https://github.com/void-linux/void-packages/pull/44300

Description:
[ci-skip] [ci skip]
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# TODO:

- **Review**. (If someone could do a rebuild of everything changed here would be highly appreciated, I am currently
leaving my laptop overnight compiling everything with xxbuild for a specific arch, see below what I have already tested, getting some crossbuilding testing would be nice)


## Local build testing

- x86_64  (native)
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#### Testing the changes
- I tested the changes in this PR: **briefly**, as in didn't test some package that were revbumped.

#### Local build testing
- I built this PR locally for my native architecture, x86_64-glibc

Previously closed the imath 3.1.8 update because of the changed shlib and the high number of packages that would need to be revbumped. Waited for openexr to release a new version and re-opened this.