[clang] [LifetimeSafety] Add missing origins stats for lifetime analysis (PR #166568)

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DEBADRIBASAK wrote:

> So print one statistics that maps from statement class (ids, no need for strings there) to counts and print another one that maps from types (again no need for string maps) to counts.

[Xazax-hun](https://github.com/Xazax-hun): We had added string maps because it is easier to interpret the types/class names as strings. Will not changing it to ids make it difficult to interpret the report?

https://github.com/llvm/llvm-project/pull/166568