Fix race conditions in ck_tile remod

[johannes-graner]

Proposed changes

Fixes a race condition in the remod script run by pre-commit that occasionally leads to truncated files.
See failed and successful runs for the same commit as an example.

The fix consists of two parts:

1. Making sure that dos2unix is run before clang-format for a given file.
2. Waiting for all subprocesses to finish before generating headers (include) or exiting (examples).

Thanks @DDEle for bringing this to my attention!

Checklist

Please put an x into the boxes that apply. You can also fill these out after creating the PR. If you're not sure, please don't hesitate to ask.

• I have added tests relevant to the introduced functionality, and the unit tests are passing locally
• I have added the test to REGRESSION_TESTS list defined at the top of CMakeLists.txt in tests/CMakeLists.txt, IF the test takes more than 30 seconds to run.
• I have added inline documentation which enables the maintainers with understanding the motivation
• I have removed the stale documentation which is no longer relevant after this pull request
• (If this change is user-facing) I have added release notes which provide the end users with a brief summary of the improvement from this pull request
• I have run clang-format on all changed files
• Any dependent changes have been merged

Discussion

If this is a relatively large or complex change, feel free to start a discussion by explaining why you chose the solution you did and what alternatives you considered