- Updated and moved `ranges::to` `[[nodiscard]]` tests to the new conventinional location. - Removed libcxx/test/libcxx/diagnostics/ranges.nodiscard.verify.cpp, which is now obsolete in favor of more specific test files. # References: - https://wg21.link/range.utility.conv - https://wg21.link/range.utility.conv.to - https://wg21.link/range.utility.conv.adaptors Towards #172124