CUDA kernel registration supports

[jiannanWang]

This pull request introduces the following changes:

1. Adds load_inline functionality and enables support for CUDA kernel registration.
2. Introduces a script for simple CUDA kernel creation
3. Adds tests for CUDA kernel registration

[msaroufim]

check the no implicit headers mode, otherwise this function will take 90s per call

[jiannanWang]

I set no_implicit headers to Ture and added the header to CUDA files. As a result, the running time for TestDirectoryBackendCUDA decreased from approximately 50 seconds to around 10 seconds.

[jiannanWang]

Update:

• set no_implicit_headers to True and the running time for TestDirectoryBackendCUDA dropped from 50s to 10s.
• CI env doesn't have CUDA_HOME and thus cannot run TestDirectoryBackendCUDA. TestDirectoryBackendCUDA is skipped in CI.