Non-fatal error output in precompile test on master CI

[Keno]

ERROR: LoadError: break me
  | Stacktrace:
  | [1] error(s::String)
  | @ Base ./error.jl:44
  | [2] top-level scope
  | @ /cache/build/tester-amdci4-13/julialang/julia-master/tmp/jltestdepot_4a8iCZ/FooBar2.jl:2
  | [3] include(mod::Module, _path::String)
  | @ Base ./Base.jl:309
  | [4] include_package_for_output(pkg::Base.PkgId, input::String, depot_path::Vector{String}, dl_load_path::Vector{String}, load_path::Vector{String}, concrete_deps::Vector{Pair{Base.PkgId, UInt128}}, source::Nothing)
  | @ Base ./loading.jl:3148
  | [5] top-level scope
  | @ stdin:5
  | [6] eval(m::Module, e::Any)
  | @ Core ./boot.jl:489
  | [7] include_string(mapexpr::typeof(identity), mod::Module, code::String, filename::String)
  | @ Base ./loading.jl:2994
  | [8] include_string
  | @ ./loading.jl:3004 [inlined]
  | [9] exec_options(opts::Base.JLOptions)
  | @ Base ./client.jl:342
  | [10] _start()
  | @ Base ./client.jl:577
  | in expression starting at /cache/build/tester-amdci4-13/julialang/julia-master/tmp/jltestdepot_4a8iCZ/FooBar2.jl:1
  | in expression starting at stdin:5
  |  

Introduced by #60000. Looks like we're testing the failure here, but we shouldn't be dumping the output.