[clang] [NFC][analyzer] Refactor Environment to map Expr to SVal instead of Stmt to SVal (PR #193295)

[Balázs Benics via cfe-commits]

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@@ -80,7 +80,7 @@ bool isTainted(ProgramStateRef State, const MemRegion *Reg,
                TaintTagType Kind = TaintTagGeneric);
 
 /// Returns the tainted Symbols for a given Statement and state.
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steakhal wrote:

`Statement` again. Pls `git diff main | grep -C3 -iE "stmt|statem"` and review the hits.

https://github.com/llvm/llvm-project/pull/193295