Disable `tests/debuginfo/pretty-std.rs` `OsString` cdb check ## Summary Since approx. Windows SDK 20348, the corresponding cdb (and/or its underlying WinDbg engine) changed or regressed the `OsStr`/`OsString` visualization, and no longer renders the emoji. Since approx. SDK/cdb 26100, the output formatting of the string containing UTF-8 (i.e. the multi-byte emoji grapheme) seems to have further regressed (e.g. the end quotation mark is no longer shown and command output becomes garbled). Relevant issues: * rust-lang/rust#88840 * rust-lang/rust#148743 * rust-lang/rust#88796 This was failing for me locally on host Windows MSVC under `./x test tests/debuginfo`. And the issues re. this case failing has been open for a long while and have not been addressed, so I propose disabling this case. I believe this is either a regression or a change in cdb and/or the underlying WinDbg. I have not bothered filing such a cdb bug report, I don't know enough about this. The check was actually relaxed to not require the emoji to be rendered properly in the output in rust-lang/rust#88842, but I feel like that regressed the original intention of the check (that multi-byte Unicode graphemes are properly rendered), so I just restored the original checks but commented them out. Maybe r? @wesleywiser (or compiler)