Merge branch 'cleanup/macos-gitignore' into 'master'

Christoph Grüningerrequested to merge
cherry-pick-b1dc3912 into releases/2.8

[gitignore] Ignore macOS caching files

See merge request !177 (merged)

(cherry picked from commit b1dc3912)

3a493a61 [gitignore] Ignore macOS caching files

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