Move exceptions to its own file.
Create MesaCITimeoutError and MesaCIRetryError with specific exception
data for better exception classification.
Avoid the use of `fatal_err` in favor of raising a proper exception.
Make _call_proxy exception handling exhaustive, add missing
ResponseError treatment.
Also, detect JobError during job result parsing. So when a LAVA timeout error
happens, it is probably cause by some boot/network issues with a
specific device, we can retry the same job in other device with the same
device_type.
Signed-off-by: Guilherme Gallo <guilherme.gallo@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15938>
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