niScope_GetChannelName() and niScope_GetChannelNameFromString() missing from niscope Python bindings

[sbethur]

Description of issue

niScope_GetChannelName() and niScope_GetChannelNameFromString() are present in NI-SCOPE C API, but missing in niscope Python bindings.

get_channel_names(indices) should be added to niscope Python bindings to cover for the 2 C entry-points mentioned above.

See here for details of behavior, implementation notes, and rationale behind get_channel_names(indices).

[marcoskirsch]

At this point we’d only want get_channel_names in the Python API.

[ni-jfitzger]

It appears this will be a requirement for fixing #1770. I implemented a fix for that issue based on what we do for nidcpower, but it doesn't work because get_channel_names isn't available to get _all_channels_in_session.