[clang] [Analyzer][CFG] Correctly handle rebuilt default arg and default init expression (PR #117437)

[via cfe-commits]

yronglin wrote:

I've made changes in Sema, if the rewritten-expr same as `Field->getInClassInitializer()`/`Param->getDefaultArg()`, this PR will set `{CXXDefaultArgExprBits, CXXDefaultInitExprBits}.HasRewrittenInit` false.

https://github.com/llvm/llvm-project/pull/117437