CI: Just run all tests, don't try to cleverly exclude some (#2766)
CI: Just run all tests, don't try to cleverly exclude some (#2766)

We were running some CI tests only for PRs or for certain branches.
This may save some time, but I found that I was, more often than not,
naming my branches to trigger all tests to run. That's silly. Just run
all the tests every time, it's not that expensive.

Signed-off-by: Larry Gritz <f0a1ce6f80112d72f7276457fd261d671b827567@larrygritz.com>
OpenImageIO/oiio,lgritz/oiio,OpenImageIO/oiio,lgritz/oiio,lgritz/oiio,lgritz/oiio,OpenImageIO/oiio,OpenImageIO/oiio