Boost update to 1.89.0

[Adam <adam%netbsd.org@localhost>]

It took me substantially long time, but finally I've got Boost ready to be updated to 1.89.0. It has one important change that might break several packages: boost_system shared library has been removed and the boost_system component is only available as header files. In practice, a package might try to detect the presence of boost_system library or try to link against it. The simple work-around is to remove any reference to boost_system from linker flags and configure scripts.

I've tested meta-pkgs/bulk-test-boost and, besides for the boost update, I have the patches and fixes for these packages:

* botan2: patch + update to 2.19.5
* gnucash: patch
* convertes/librevenge: remove patches/patch-librevenge.pc.in
* graphics/pcl: patch
* archivers/innoextract: patch
* math/libixion: patch
* graphics/gource: patch
* ham/gnuradio-core: patch
* net/icinga2: patch + update to 2.15.0
* misc/libreoffice: remove LDFLAGS from main Makefile
* audio/ncmpcpp: update to 0.10.1
* geography/osm2pgsql: patch
* cad/openscad: patch

I wasn't able to build the following for reasons not related to Boost:

- blender: failes for undefined 'ustringHash' - I have no idea what defined that in the past (maybe openimageio?), but the definition is gone (I know it should be an alias to uint64_t); clearly, Blender needs an update.

- devel/libftdi1: doesn't build because of swig - tried Python 3.12 and Python 3.13 without success.

- misc/libreoffice: fails to build on my NetBSD-aarch64 with "! Error: CFI instruction used without previous .cfi_startproc".


If there are no objections, I would like to proceed with the changes anytime soon.

Kind regards,
Adam