[llvm] [Dexter] Temporarily print DAP logs on specific exception (PR #157130)

[Orlando Cazalet-Hyams via llvm-commits]

OCHyams wrote:

Reopening. If we add `--dump-input-context=999999999` FileCheck will print the output for us.

I'd like to merge this, wait for a few failures, then revert it once we've got those logs.

This will be much much easier than trying to fish out logs produced by #157145 (we can revert that too)

https://github.com/llvm/llvm-project/pull/157130