[lldb] Improve the error message in run_to_breakpoint_do_run

Improve the error message when we fail to hit the initial breakpoint in
run_to_breakpoint_do_run. In addition to the process state, we no

[lldb] Improve the error message in run_to_breakpoint_do_run

Improve the error message when we fail to hit the initial breakpoint in
run_to_breakpoint_do_run. In addition to the process state, we now also
report the exit code and reason (if the process exited) as well as the
inferior's output.

Differential revision: https://reviews.llvm.org/D111978

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