Revert "[Clang][CWG1815] Support lifetime extension of temporary created by...
Revert "[Clang][CWG1815] Support lifetime extension of temporary created by aggregate initialization using a default member initializer (#87933)" This reverts commit 17daa204. Multiple examples on the PR https://github.com/llvm/llvm-project/pull/87933 show regressions, so reverting until they can be fixed in the followup.