Fix unit conversion for projection

[luca009]

Description of Changes

Due to an issue with the codebase, the units of the x and y axes cannot be checked until the classes handling projection are already initialized. This results in the issue that the projection conversion always assumes that units are in km, when they might not be (see #1278). This PR is a fix for this issue, but it definitely needs to be replaced with a better approach some time later. As mentioned, this seems to be a rather deeply rooted issue with the way a NetcdfDataset gets initialized. Judging by some comments, this also isn't a new problem.

PR Checklist

• [X] Link to any issues that the PR addresses
• [ ] Add labels
• [X] Open as a draft PR until ready for review
• [ ] Make sure GitHub tests pass
• [x] Mark PR as "Ready for Review"

[CLAassistant]

All committers have signed the CLA.

[haileyajohnson]

Hi @luca009 , thank you so much for your contribution! There are two things this pull request needs to be merged:

1. You've changed the method signature of several public methods/constructors - we can't do that without changing the major version, but we can merge added overload methods
2. To pass the code style check, run the gradle task spotlessApply

[luca009]

Hi @luca009 , thank you so much for your contribution! There are two things this pull request needs to be merged:

1. You've changed the method signature of several public methods/constructors - we can't do that without changing the major version, but we can merge added overload methods

2. To pass the code style check, run the gradle task `spotlessApply`

Should all be fixed up now, thank you for the kind reminders. This is my first time contributing to another project :)