[compiler-rt] [scudo] Add static vector functionality. (PR #98986)

[Christopher Ferris via llvm-commits]

https://github.com/cferris1000 approved this pull request.

Originally, I though we might want to allow a zero length capacity. But thinking about it a bit more, I don't think we should since that would likely be a bug. If we ever decide to allow it, we can change the static assert.

Chia-hung, make sure the usage of bytes instead of items is okay with you.

https://github.com/llvm/llvm-project/pull/98986