Upgrade various build-packages

[waddlesplash]

This should be done before the next release.

1. libsolv (​https://review.haiku-os.org/c/haiku/+/6270)

This will require careful testing, as libsolv is used for dependency solving in Package Kit.

2. ICU (​https://review.haiku-os.org/c/haiku/+/5966/4 and ​https://github.com/haikuports/haikuports/pull/7665)

ICU 67 is now outdated, but apparently anything newer than 69 results in an unbootable system. That will need to be investigated.

Additionally, there are a number of packages that will need to be rebuilt following an ICU upgrade, so as to avoid requiring two versions of ICU with the base install.

3. Gutenprint (​https://review.haiku-os.org/c/haiku/+/5969 and #17836)

This should be straightforward.

4. OpenEXR (#18537)

See comments in that ticket: some work at HaikuPorts will be needed before this is done.

[pulkomandy]

Also add ffmpeg to this list: #17829

Probably some more functions we use are going to be deprecated, I'm OK with solving these problems if needed.

[pulkomandy]

Regarding ICU: the most likely problem is that ICU ends up calling the standard C library for some locale things. They do not take into account that our C locale support is implemented using ICU. We already patched some things like that in previous versions, and I think they were happy to upstream those patches.

The problem is investigating exactly which function is problematic.

That being said, updating to ICU 67 would already be nice :)

[kallisti5]

ICU 74 is being tracked here: ​https://review.haiku-os.org/c/haiku/+/7346

https://dev.haiku-os.org/ticket/18769 tracks the current ICU crash. Pulkomandy found the cause, just need to figure out why it's happening since we should be patching around it.

[kallisti5]

We're on ICU 74 as of hrev57575

[kallisti5]

ffmpeg6 on all x86 ports as of hrev57669

[kallisti5]

gutenprint8 updated to gutenprint9 on all x86 ports as of hrev57671

[pulkomandy]

During the update of OpenSSL, Python also need to be rebuilt. Should we update to Python 3.10 or some later version as well while we're at it? Python 3.10 is the one providing cmd:python3 in Haikuports at the moment, so it would make sense to use that.