Add script to mirror intel/llvm commits

[kbenzie]

This script uses git format-patch and git am to mirror commits from the unified-runtime top level directory of intel/llvm to the current branch of an oneapi-src/unified-runtime checkout. These operations require tracking the base intel/llvm commit after which the changes should be mirrored, this is done using the new file .github/intel-llvm-mirror-base-commit which is updated on successful completion of the script.

[github-actions]

Unified Runtime -> intel/llvm Repo Move Notice

Information

The source code of Unified Runtime has been moved to intel/llvm under the unified-runtime top-level directory,
all future development will now be carried out there. This was done in intel/llvm#17043.

The code will be mirrored to oneapi-src/unified-runtime and the specification will continue to be hosted at oneapi-src.github.io/unified-runtime.

The contribution guide will be updated with new instructions for contributing to Unified Runtime.

PR Migration

All open PRs including this one will be marked with the auto-close label and shall be automatically closed after 30 days.

Should you wish to continue with your PR you will need to migrate it to intel/llvm.
We have provided a script to help automate this process.

If your PR should remain open and not be closed automatically, you can remove the auto-close label.

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This is an automated comment.