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

[Arseniy Zaostrovnykh via cfe-commits]

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+===================
+Analysis Statistics
+===================
+
+CSA enjoys two facilities to collect statistics: per translation unit and per entry point.
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necto wrote:

Expanded to be on the safe side
548eaadabf32 Expand acronym


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