[clang] [Clang] Implement P2718R0 "Lifetime extension in range-based for loops" (PR #76361)

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cor3ntin wrote:

Here is what I'd like to do @yronglin
Revert the changes to BuildCXXDefaultInit.
And land it in main.
Then we'll have a few weeks to decide if we backport it to 18. Dies that sound good to you?

https://github.com/llvm/llvm-project/pull/76361