[llvm] [ThinLTO] Shrink GlobalValueSummary by 8 bytes (PR #107342)

[Kazu Hirata via llvm-commits]

kazutakahirata wrote:

Please take a look.  Thanks!

- I've updated the PR to use `SmallVector<ValueInfo> &` and `SmallVector<ValueInfo> &&` where I can.
- I've added a missing `std::move` to `ModuleSummaryIndexYAML.h`.

https://github.com/llvm/llvm-project/pull/107342