[clang] [Clang] Optimize some `getBeginLoc` implementations (PR #141058)

[Younan Zhang via cfe-commits]

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@@ -563,17 +563,21 @@ class alignas(void *) Stmt {
     unsigned HasFPFeatures : 1;
 
     /// True if the call expression is a must-elide call to a coroutine.
+    LLVM_PREFERRED_TYPE(bool)
     unsigned IsCoroElideSafe : 1;
 
-    /// Padding used to align OffsetToTrailingObjects to a byte multiple.
-    unsigned : 24 - 4 - NumExprBits;
+    /// Tracks When CallExpr is used to represent an explicit object
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zyn0217 wrote:

```suggestion
    /// Tracks when CallExpr is used to represent an explicit object
```

https://github.com/llvm/llvm-project/pull/141058