refactor: make configuration-passing from make_dependency_files() to make_dependency_file() stricter

[jameslamb]

Similar to #64, this proposes small changes to make bugs related to passing configuration between the project's functions less likely.

• requires that make_dependency_file() (which takes 7 arguments) only be called with keyword arguments
• removes default on extras in that function

How is this safe?

make_dependency_file() is only called in one place, and that place supplies a value for extras.

https://github.com/rapidsai/dependency-file-generator/blob/36a40613235089b4de271367ccef3674678c1555/src/rapids_dependency_file_generator/rapids_dependency_file_generator.py#L442-L450

[GPUtester]

:tada: This PR is included in version 1.9.0 :tada:

The release is available on:

• GitHub release
• PyPI release

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