[clang] [WebKit checkers] Treat the return value of an instance method as an unsafe pointer origin (PR #160569)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,h -- clang/lib/StaticAnalyzer/Checkers/WebKit/ASTUtils.cpp clang/lib/StaticAnalyzer/Checkers/WebKit/RawPtrRefCallArgsChecker.cpp clang/lib/StaticAnalyzer/Checkers/WebKit/RawPtrRefLocalVarsChecker.cpp clang/test/Analysis/Checkers/WebKit/objc-mock-types.h
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/StaticAnalyzer/Checkers/WebKit/RawPtrRefCallArgsChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/WebKit/RawPtrRefCallArgsChecker.cpp
index ce35cf330..eedc1465c 100644
--- a/clang/lib/StaticAnalyzer/Checkers/WebKit/RawPtrRefCallArgsChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/WebKit/RawPtrRefCallArgsChecker.cpp
@@ -180,7 +180,8 @@ public:
     if (auto *Receiver = E->getInstanceReceiver()) {
       std::optional<bool> IsUnsafe = isUnsafePtr(E->getReceiverType());
       if (IsUnsafe && *IsUnsafe && !isPtrOriginSafe(Receiver)) {
-        if (auto *InnerMsg = dyn_cast<ObjCMessageExpr>(Receiver->IgnoreParenCasts())) {
+        if (auto *InnerMsg =
+                dyn_cast<ObjCMessageExpr>(Receiver->IgnoreParenCasts())) {
           auto InnerSelector = InnerMsg->getSelector();
           auto SelName = Selector.getNameForSlot(0);
           if (InnerSelector.getNameForSlot(0).starts_with("alloc") &&

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https://github.com/llvm/llvm-project/pull/160569