[vm] Reland kernel data library and class caches. This is the same code as the previous commit, but it needs a fix for issue #34953 to land first. Change-Id: Id586f5e8a5ee498716e58ff44bb8a344822f73df Reviewed-on: https://dart-review.googlesource.com/c/81840 Reviewed-by: Ryan Macnak <rmacnak@google.com> Commit-Queue: Zach Anderson <zra@google.com>
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