Artifacts: intermittent overrides test failures

[IanButterworth]

https://buildkite.com/julialang/julia-master/builds/31649#018cbbb3-b846-42e2-974a-02e4819e2f05/12788-13163

  | Artifacts                                        (2) \|         failed at 2023-12-30T18:19:23.254
  | Test Failed at C:\buildkite-agent\builds\win2k22-amdci6-6\julialang\julia-master\julia-89cae45ea4\share\julia\stdlib\v1.11\Artifacts\test\runtests.jl:57
  | Expression: load_overrides() == empty_output
  | Evaluated: Dict{Symbol, Any}(:UUID => Dict{Base.UUID, Dict{String, Union{Base.SHA1, String}}}(UUID("7b879065-7f74-5fa4-bdd5-9b7a15df8941") => Dict("arty" => SHA1("64d0b4f8d9c004b862b38c4acfbd74988226995c"), "barty" => "C:\\Users\\julia\\AppData\\Local\\Temp\\jl_J2qFKz\\a_wild_barty_appears")), :hash => Dict{Base.SHA1, Union{Base.SHA1, String}}(SHA1("087d8c93bff2f2b05f016bcd6ec653c8def76568") => SHA1("64d0b4f8d9c004b862b38c4acfbd74988226995c"))) == Dict{Symbol, Any}(:UUID => Dict{Base.UUID, Dict{String, Union{Base.SHA1, String}}}(), :hash => Dict{Base.SHA1, Union{Base.SHA1, String}}())
  |  
  | Test Failed at C:\buildkite-agent\builds\win2k22-amdci6-6\julialang\julia-master\julia-89cae45ea4\share\julia\stdlib\v1.11\Artifacts\test\runtests.jl:73
  | Expression: load_overrides() == empty_output
  | Evaluated: Dict{Symbol, Any}(:UUID => Dict{Base.UUID, Dict{String, Union{Base.SHA1, String}}}(UUID("7b879065-7f74-5fa4-bdd5-9b7a15df8941") => Dict("arty" => SHA1("64d0b4f8d9c004b862b38c4acfbd74988226995c"), "barty" => "C:\\Users\\julia\\AppData\\Local\\Temp\\jl_J2qFKz\\a_wild_barty_appears")), :hash => Dict{Base.SHA1, Union{Base.SHA1, String}}(SHA1("087d8c93bff2f2b05f016bcd6ec653c8def76568") => SHA1("64d0b4f8d9c004b862b38c4acfbd74988226995c"))) == Dict{Symbol, Any}(:UUID => Dict{Base.UUID, Dict{String, Union{Base.SHA1, String}}}(), :hash => Dict{Base.SHA1, Union{Base.SHA1, String}}())