Enforce line endings in AP_DDS with pre-commit

[Ryanf55]

Github is warning me about files in my DDS PR's that are missing a newline. There's a pre-commit hook that could be run before I push to fix this problem.

There are only a few files in ArduPilot violating the hook, perhaps we might as well fix all of them and enforce this hook?

Here's a good reason we should do it in the whole codebase - it's a UNIX standard: https://stackoverflow.com/a/729795/11032285

See #24555

[Ryanf55]

Superseded by #24683