Remove symbolic links from provided archives

**Is your feature request related to a problem? Please describe.**

Various archives provided for download contain symbolic links.

E.g. the linux archives contain symlinks like
```bash
ADDITIONAL_LICENSE_INFO -> ../java.base/ADDITIONAL_LICENSE_INFO
ASSEMBLY_EXCEPTION -> ../java.base/ASSEMBLY_EXCEPTION
LICENSE -> ../java.base/LICENSE
```

in the subdirectories of the `legal` directory.

Many tools, especially tools that run on the Java Platform, cannot handle such symlinks.
E.g. Gradle and Ant's built-in TAR support create empty files intead of symlinks when
extracting Adoptium JDK from the provided TAR archives.

Currently we work around the problem by
* downloading the archives manually,
* extracting the files using the native `tar` command,
* replacing links with regular files,
* creating a new archive,
* signing it with our own signing key,
* and deploying it for download by the build system (Gradle).

This process is cumbersome and could be avoided if the archives would not contain symlinks.

**Describe the solution you'd like**

Replace the symlinks with files that contain a textual reference to the files in
`../java.base/`, exactly as it is done with the Adoptium JDK Windows ZIP archives.

Start by locating the archive packaging entry points for the Linux downloads and the existing Windows ZIP handling. Compare how files under the legal directories are produced, then verify that extracted Linux archives contain regular files with textual references rather than symbolic links.

Written by the indexing model from the issue text.