Bazel: add codeql specific packaging library

[redsun82]

This encapsulate arch specific logic, local installation and separation of zip files into generic and arch-specific parts as required by the internal build. Moreover, it introduces codeql_pkg_zip_import, which allows to add a .zip file to the pack in a highly optimized way:

• when installing the pack, ripunzip will be used to unzip the zip file contents to the destination directory
• when creating a zip file of the pack, a special purpose zipmerge (ported from the internal repository) merges the imported zips into the output, without decompressing.

These are applied to swift as an example.