After Renaming "Bake Curve" to "Samples to Keys" in #111049,
the name of the `GRAPH_OT_sample` operator needed renaming.
That is because the word "sample" is now used to describe FCurve
data in an uneditable state.
Rename to `GRAPH_OT_bake_keys` since baking is the term
used in animation to describe the action of creating dense key data.
Pull Request: https://projects.blender.org/blender/blender/pulls/112148
9e5e04e915