Fix Heap-use-after-free in GpuQueueSubmissionProcessor (#2402)
Fix Heap-use-after-free in GpuQueueSubmissionProcessor (#2402)

Esentially, the `matching_gpu_job` can already get deleted by
the `ProcessGpuQueueSubmissionWithMatchingGpuJob`.

Bug: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=34934
Test: Run the Fuzzer with the given input
google/orbit,google/orbit,google/orbit,google/orbit