[ci] fix golangci file name, address all unaddressed linter issues

[AshleyDumaine]

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

[AshleyDumaine]

Closing in favor of https://github.com/linode/linode-blockstorage-csi-driver/pull/253