Adds missing video encoding NVIDIA ioctl classes

[luiscape]

This adds missing NVJPG (JPEG encoding/decoding) and optical flow classes. Both are used in video-processing workflows, hence the video capability conditional.

[google-cla]

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[luiscape]

@ayushr2 happy to resubmit this PR if the Google CLA issue above is hard to fix.

[EtiennePerot]

The CLA check is unhappy about your git commit author, which is set to Author: EC2 Default User <ec****er​@ip-172-31-9-97.ec2.internal>. Can you reset the commit author metadata to your own?

[luiscape]

@EtiennePerot thanks. Fixed!

[parth-opensrc]

Hi,
It seems like the unit tests are broken:

https://buildkite.com/gvisor/pipeline/builds/41271/steps/canvas?sid=019d69e1-497f-41c2-8ff9-7134828edaae&tab=output

FAIL: TestStructDefinitionParity (0.00s)
--
--- FAIL: TestStructDefinitionParity/535.183.06 (24.88s)
nvproxy_driver_parity_test.go:128: struct "NV_OFA_ALLOCATION_PARAMETERS" has different definitions between nvproxy and driver: mismatched sizes for struct "NV_OFA_ALLOCATION_PARAMETERS" between nvproxy (12) and driver (8) (bytes)
nvproxy_driver_parity_test.go:128: struct "NV_OFA_ALLOCATION_PARAMETERS" has different definitions between nvproxy and driver: mismatched sizes for struct "NV_OFA_ALLOCATION_PARAMETERS" between nvproxy (12) and driver (8) (bytes)
nvproxy_driver_parity_test.go:128: struct "NV_OFA_ALLOCATION_PARAMETERS" has different definitions between nvproxy and driver: mismatched sizes for struct "NV_OFA_ALLOCATION_PARAMETERS" between nvproxy (12) and driver (8) (bytes)
nvproxy_driver_parity_test.go:128: struct "NV_OFA_ALLOCATION_PARAMETERS" has different definitions between nvproxy and driver: mismatched sizes for struct "NV_OFA_ALLOCATION_PARAMETERS" between nvproxy (12) and driver (8) (bytes)
--- FAIL: TestStructDefinitionParity/535.247.01 (25.44s)
nvproxy_driver_parity_test.go:128: struct "NV_OFA_ALLOCATION_PARAMETERS" has different definitions between nvproxy and driver: mismatched sizes for struct "NV_OFA_ALLOCATION_PARAMETERS" between nvproxy (12) and driver (8) (bytes)
nvproxy_driver_parity_test.go:128: struct "NV_OFA_ALLOCATION_PARAMETERS" has different definitions between nvproxy and driver: mismatched sizes for struct "NV_OFA_ALLOCATION_PARAMETERS" between nvproxy (12) and driver (8) (bytes)
nvproxy_driver_parity_test.go:128: struct "NV_OFA_ALLOCATION_PARAMETERS" has different definitions between nvproxy and driver: mismatched sizes for struct "NV_OFA_ALLOCATION_PARAMETERS" between nvproxy (12) and driver (8) (bytes)
nvproxy_driver_parity_test.go:128: struct "NV_OFA_ALLOCATION_PARAMETERS" has different definitions between nvproxy and driver: mismatched sizes for struct "NV_OFA_ALLOCATION_PARAMETERS" between nvproxy (12) and driver (8) (bytes)
--- FAIL: TestStructDefinitionParity/535.261.03 (19.24s)

...................

[ayushr2]

Be sure to run the tests in https://github.com/google/gvisor/tree/master/pkg/sentry/devices/nvproxy#step-3-account-for-abi-changes when modifying the version map (adding new ioctls or version support).

[luiscape]

Thank you for the reviews. Taking a look.

[luiscape]

@ayushr2 updated with your proposed changes. Thank you.