[GR-54128] Re-import libsvm_container code and add change detection annotations

[graalvmbot]

This change on top of #8989 re-imports the libsvm_container code from the JDK and adds annotations to keep track of upstream changes. In particular:

• re-import libsvm_container code from JDK 24+5
• add @BasedOnJDKFile annotation for libsvm_container files imported from JDK
• add mx gate --tags check_libcontainer_annotations gate job
• add mx reimport-libcontainer-files --jdk-repo path/to/jdk/open

[zapster]

@jerboaa while this follow-up PR to #8989 is still in progress, it should give you an idea how we gonna deal with keeping the libsvm_container up to date. Since that PR was lying around for some time now, I had the opportunity to re-import the code several times and it always was seamless and fast (<1h). With the @BasedOnJDKFile annotations we will never miss any changes to the relevant code. (And yes, we already noticed openjdk/jdk#18201 😉)

I hope that this will address most of the concerns you shared in #8989 (comment).

[zapster]

(Fun fact: I just noticed the behavior fixed by openjdk/jdk#18201 yesterday when testing this change and was a bit puzzled. So thanks for the fix. 🙂)

[jerboaa]

Thanks for the heads-up.