[FEA] Apply the RAII event wrapper wherever possible

[kingcrimsontianyu]

Is your feature request related to a problem? Please describe.

The stream pool implementation internally uses a RAII event wrapper, where the CUDA event is created with the flag cudaEventDisableTiming for potential performance improvement. This wrapper class should be applied to other part of libcudf wherever possible (where event-based timing is not needed), such as this, this, this, and this.

Describe the solution you'd like
Make the event wrapper publicly available for use in other parts of libcudf.

Describe alternatives you've considered
N/A

Additional context
N/A