This allows failing fast (optionally still tracing, if set with
PAN_MESA_DEBUG=trace) when a GPU fault is introduced. This is better
behaviour for both use cases:
1. When debugging a known fault, setting this mode together with trace
will stop the driver as soon as a buggy command stream is submitted,
and the offending stream will be the last trace file.
2. When running test suites (particularly in CI), setting this mode
will detect faults and crash, causing the pipeline to fail fast as
opposed to incorrectly marking the run green if the test happens to
pass despite the faults and slow downs.
Signed-off-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10938>
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