prevent heap snapshot test to write to julia dir

[KristofferC]

Otherwise errors on PkgEval (and it is a good idea nonetheless): https://s3.amazonaws.com/julialang-reports/nanosoldier/pkgeval/by_hash/9a67956_vs_17cfb8e/Profile.primary.log

ERROR: SystemError: opening file "/opt/julia/share/julia/stdlib/v1.9/Profile/test/32_3557048005887140.heapsnapshot": Read-only file system

[maleadt]

The profile test actually failed:

Profile                                           (2) |         failed at 2023-01-30T08:22:49.065
Error During Test at C:\buildkite-agent\builds\win2k22-amdci6-1\julialang\julia-master\julia-6e145e4ba0\share\julia\stdlib\v1.10\Profile\test\runtests.jl:281
  Got exception outside of a @test
  failed process: Process(`'C:\buildkite-agent\builds\win2k22-amdci6-1\julialang\julia-master\julia-6e145e4ba0\bin\julia.exe' -Cnative '-JC:\buildkite-agent\builds\win2k22-amdci6-1\julialang\julia-master\julia-6e145e4ba0\lib\julia\sys.dll' --depwarn=error --check-bounds=yes -g1 --startup-file=no --startup-file=no -e 'using Profile; print(Profile.take_heap_snapshot("C:\Users\julia\AppData\Local\Temp\jl_cVcTCn67GL"))'`, ProcessExited(1)) [1]
  Stacktrace:
    [1] pipeline_error
      @ .\process.jl:565 [inlined]
    [2] read(cmd::Cmd)
      @ Base .\process.jl:449
    [3] read(cmd::Cmd, #unused#::Type{String})
      @ Base .\process.jl:458
    [4] macro expansion
      @ C:\buildkite-agent\builds\win2k22-amdci6-1\julialang\julia-master\julia-6e145e4ba0\share\julia\stdlib\v1.10\Profile\test\runtests.jl:283 [inlined]
    [5] macro expansion
      @ C:\buildkite-agent\builds\win2k22-amdci6-1\julialang\julia-master\julia-6e145e4ba0\share\julia\stdlib\v1.10\Test\src\Test.jl:1502 [inlined]
    [6] top-level scope
      @ C:\buildkite-agent\builds\win2k22-amdci6-1\julialang\julia-master\julia-6e145e4ba0\share\julia\stdlib\v1.10\Profile\test\runtests.jl:282
    [7] include
      @ .\Base.jl:456 [inlined]
    [8] macro expansion
      @ C:\buildkite-agent\builds\win2k22-amdci6-1\julialang\julia-master\julia-6e145e4ba0\share\julia\test\testdefs.jl:29 [inlined]
    [9] macro expansion
      @ C:\buildkite-agent\builds\win2k22-amdci6-1\julialang\julia-master\julia-6e145e4ba0\share\julia\stdlib\v1.10\Test\src\Test.jl:1502 [inlined]
   [10] macro expansion
      @ C:\buildkite-agent\builds\win2k22-amdci6-1\julialang\julia-master\julia-6e145e4ba0\share\julia\test\testdefs.jl:23 [inlined]
   [11] macro expansion
      @ .\timing.jl:501 [inlined]
   [12] runtests(name::String, path::String, isolate::Bool; seed::UInt128)
      @ Main C:\buildkite-agent\builds\win2k22-amdci6-1\julialang\julia-master\julia-6e145e4ba0\share\julia\test\testdefs.jl:21
   [13] kwcall(::NamedTuple{(:seed,), Tuple{UInt128}}, ::typeof(runtests), name::String, path::String)
      @ Main C:\buildkite-agent\builds\win2k22-amdci6-1\julialang\julia-master\julia-6e145e4ba0\share\julia\test\testdefs.jl:5
   [14] #invokelatest#2
      @ .\essentials.jl:825 [inlined]
   [15] kwcall(::NamedTuple{(:seed,), Tuple{UInt128}}, ::typeof(invokelatest), ::Any, ::Any, ::Any)
      @ Base .\essentials.jl:820
   [16] (::Distributed.var"#110#112"{Distributed.CallMsg{:call_fetch}})()
      @ Distributed C:\buildkite-agent\builds\win2k22-amdci6-1\julialang\julia-master\julia-6e145e4ba0\share\julia\stdlib\v1.10\Distributed\src\process_messages.jl:285
   [17] run_work_thunk(thunk::Distributed.var"#110#112"{Distributed.CallMsg{:call_fetch}}, print_error::Bool)
      @ Distributed C:\buildkite-agent\builds\win2k22-amdci6-1\julialang\julia-master\julia-6e145e4ba0\share\julia\stdlib\v1.10\Distributed\src\process_messages.jl:70
   [18] macro expansion
      @ C:\buildkite-agent\builds\win2k22-amdci6-1\julialang\julia-master\julia-6e145e4ba0\share\julia\stdlib\v1.10\Distributed\src\process_messages.jl:285 [inlined]
   [19] (::Distributed.var"#109#111"{Distributed.CallMsg{:call_fetch}, Distributed.MsgHeader, Sockets.TCPSocket})()
      @ Distributed .\task.jl:514