Rename "pkg/linode-bs" to "internal/driver"

[nesv]

This pull request renames pkg/linode-bs to internal/driver. No other functionality has been changed.

The purpose behind this commit is to clean up the structure of this module, and not use a hyphenated package name.

General:

• [x] Have you removed all sensitive information, including but not limited to access keys and passwords?
• [x] Have you checked to ensure there aren't other open or closed Pull Requests for the same bug/feature/question?

Pull Request Guidelines:

1. [ ] Does your submission pass tests?
2. [ ] Have you added tests?
3. [x] Are you addressing a single feature in this PR?
4. [x] Are your commits atomic, addressing one change per commit?
5. [x] Are you following the conventions of the language?
6. [x] Have you saved your large formatting changes for a different PR, so we can focus on your work?
7. [x] Have you explained your rationale for why this feature is needed?
8. [ ] Have you linked your PR to an open issue

[nesv]

Rebased onto latest main to pull in changes from @mhmxs