Examples: Standardize filenaming

[mdboom]

Is this a duplicate?

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Area

cuda.bindings

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

Many of the cuda.bindings examples have camelCase file names that seem out-of-place in a Python project. Additionally, they have _test.py suffixes, which should be removed.

Describe the solution you'd like

We should convert to snake_case.

Describe alternatives you've considered

No response

Additional context

No response