Add negative tests that inject memory allocation failures and verify
error handling path in common.gr.ctx unit.
Update common.gr.global_ctx unit test to check if global context
buffers are ready after allocation call.
Jira NVGPU-4373
Change-Id: Ia373441819257890f9f10667e6e2e363081a6757
Signed-off-by: Deepak Nibade <dnibade@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2259074
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
