[clang] [clang] Do less advertising for unresolved issues in `cxx_dr_status.html` (PR #78836)

[Vlad Serebrennikov via cfe-commits]

Endilll wrote:

@AaronBallman I updated this PR following our offline discussion. Title, description, contents are basically all new.

@cor3ntin It would be nice if you can go over your tests to check that date or paper number is what you want them to be. I filled them in based on latest resolution published at the time they were committed

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