[flang-commits] [clang] [clang-tools-extra] [flang] Fix OOM in FormatDiagnostic (2nd attempt) (PR #108866)

[Vakhurin Sergei via flang-commits]

igelbox wrote:

Errors were fixed. If there's some other `make` target that could catch even more errors - please lemme know.
cc: @AaronBallman

I'm gonna remove Draft from this PR after `check-all` target finish with OK-state.

https://github.com/llvm/llvm-project/pull/108866