f87dd03eb5
When a given render test defined in CMakeLists.txt with a `--outdir`
parameter ends with a trailing slash, the resulting global report
overwrites the specific test's report. This is because `os.path.dirname`
for a path that ends in a slash returns the same directory, for example,
`os.path.dirname('foo/bar/') => 'foo/bar'
To avoid tests being able to put the report into a weird state, this
commit normalizes the `--outdir` path to strip trailing slashes.
Pull Request: https://projects.blender.org/blender/blender/pulls/133791