drm/xe: Don't free job in TDR

drm/xe: Don't free job in TDR

Freeing job in TDR is not safe as TDR can pass the run_job thread
resulting in UAF. It is only safe for free job to naturally be called by
the scheduler. Rather free job in TDR, add to pending list.

Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/2811
Cc: Matthew Auld <[email protected]>
Fixes: e275d61c5f3f ("drm/xe/guc: Handle timing out of signaled jobs gracefully")
Signed-off-by: Matthew Brost <[email protected]>
Reviewed-by: Matthew Auld <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
(cherry picked from commit ea2f6a77d0c40d97f4a4dc93fee4afe15d94926d)
Signed-off-by: Lucas De Marchi <[email protected]>