In main only, i.e. for OSL 1.16 release late in 2026, raise the
minimum OpenImageIO supported to 3.0.
That means that the mostly-2027 version of OSL will support building
against OIIO 3.2 (2027), 3.1 (2026), or 3.0 (2025), which I think is
enough range.
In the process, I shuffled some CI variants around. Removed a couple
variants that used OIIO 2.5, and bumped the job we use for testing a
debug build from being based on 2023 containers to 2026, and the job
we use for checking ABI to 2025.
Signed-off-by: Larry Gritz <lg@larrygritz.com>
Larry Gritz
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