and mark py-opentimelineio as USES=python:3.11+ because versions
3.10 and older fail to package (some modules do not build).

Please everyone do test your ports with

BUILD_ALL_PYTHON_FLAVORS=       yes

in your /usr/local/etc/poudriere.d/make.conf - and

poudriere bulk -Ct -j "$JAIL" multimedia/py-opentimelineio@all

(the @all is the crucial part here)

EXT_SUFFIX, according to PEP 3149, refers to the full tag and
extension for compiled extension module objects, eg .cpython-311.so,
.cpython-313t.so, etc. We do not use the correct semantic meaning,
and this usage becomes ambiguous and confusing when tags do not
match between bytecode and compiled extension module objects.

Rename our PYTHON_EXT_SUFFIX to PYTHON_TAG to align with PEP 3147's
specification of a magic tag, which consists of implementation name
and shorthand version only. This is meant for bytecode and other
files containing this tag in their filename that do not depend on
a specific Python ABI for the same version. Chase all existing
consumers.

Introduce PYTHON_SOABI to align with PEP 3149's specification of a
tag, which consists of implementation name, shorthand version and
any ABI flags present (this and PYTHON_TAG are identical without
ABI flags). This is meant for compiled extension module objects and
other files that depend on a specific Python ABI for the same
version.

Add documentation for these variables that our PYTHON_EXT_SUFFIX
never had.

PR: 274671
Event: Kitchener-Waterloo Hackathon 202506

Any missed ports, feel free to bump.

Any ports that need setuptools at runtime can have the devel/py-setuptools
manually added back to RUN_DEPENDS, but understand that this practice
is deprecated; see CHANGES for details.

Reported by:	fallout

Convert bunch of ports to USES=cmake:indirect

Reported by:	portscout

...because math/Imath 3.1.9 reset the major version of
libImath to 29 from 31. See math/Imath 3.1.9 for details.