[clang] [WebKit checkers] Treat a weak property / variable as safe (PR #163689)

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<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- clang/lib/StaticAnalyzer/Checkers/WebKit/RawPtrRefLambdaCapturesChecker.cpp clang/lib/StaticAnalyzer/Checkers/WebKit/RawPtrRefLocalVarsChecker.cpp clang/lib/StaticAnalyzer/Checkers/WebKit/RawPtrRefMemberChecker.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/StaticAnalyzer/Checkers/WebKit/RawPtrRefMemberChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/WebKit/RawPtrRefMemberChecker.cpp
index e4cbd2901..0e23ae34e 100644
--- a/clang/lib/StaticAnalyzer/Checkers/WebKit/RawPtrRefMemberChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/WebKit/RawPtrRefMemberChecker.cpp
@@ -231,7 +231,8 @@ public:
     // "assign" property doesn't retain even under ARC so treat it as unsafe.
     bool ignoreARC =
         !PD->isReadOnly() && PD->getSetterKind() == ObjCPropertyDecl::Assign;
-    bool IsWeak = PD->getPropertyAttributes() & ObjCPropertyAttribute::kind_weak;
+    bool IsWeak =
+        PD->getPropertyAttributes() & ObjCPropertyAttribute::kind_weak;
     bool HasSafeAttr = PD->isRetaining() || IsWeak;
     auto IsUnsafePtr = isUnsafePtr(QT, ignoreARC);
     return {IsUnsafePtr && *IsUnsafePtr && !HasSafeAttr, PropType};

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https://github.com/llvm/llvm-project/pull/163689