Barnabás Pőcze b181327131 test: Remove uses of O_TMPFILE ...

`O_TMPFILE` requires file system support, which may not be available in
certain environments, usually containerized ones. So do not use it.

A new function is added for tests to be able to create unnamed temporary
files using `libcamera::MemFd` as the implementation.

Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>

2026-02-10 09:53:32 +01:00

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