[clang] [Clang] Be less strict about diagnosing null pointer dereference. (PR #149648)

[via cfe-commits]

llvmbot wrote:

<!--IGNORE-->
Failed to cherry-pick: c43f828

https://github.com/llvm/llvm-project/actions/runs/16391072188

Please manually backport the fix and push it to your github fork.  Once this is done, please create a [pull request](https://github.com/llvm/llvm-project/compare)

https://github.com/llvm/llvm-project/pull/149648