[lldb] [llvm] [libcxx] [flang] [libc] [libcxxabi] [clang-tools-extra] [clang] [compiler-rt] Move nondiscard tests of ranges::contains() to the right place. (PR #76887)

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ZijunZhaoCCK wrote:

> Maybe you need to update the status page, papers and release notes too: https://libcxx.llvm.org/Status/Ranges.html https://libcxx.llvm.org/ReleaseNotes/18.html

Thank you for reminding! I will update those files after I finish `ranges::contains_subrange`.

https://github.com/llvm/llvm-project/pull/76887