[clang] [clang] Stop reporting unresolved issues in `cxx_dr_status.html` (PR #78836)

[Vlad Serebrennikov via cfe-commits]

Endilll wrote:

@cor3ntin During our offline discussion with @AaronBallman, points "we don't want to read tea leaves" and "CWG can change their opinion" were repeated so often, that I thought we have consensus on using only official source on information, i.e. issue list. I also don't see why it's so necessary to be ahead of the committee when it requires insider knowledge.

https://github.com/llvm/llvm-project/pull/78836