[clang] [analyzer] Introduce per-entry-point statistics (PR #131175)

[Donát Nagy via cfe-commits]

================
@@ -0,0 +1,162 @@
+// EntryPointStats.h - Tracking statistics per  entry point -*- C++ -*-//
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NagyDonat wrote:

```suggestion
// EntryPointStats.h - Tracking statistics per entry point --*- C++ -*-//
```
Just a doubled space.

https://github.com/llvm/llvm-project/pull/131175