CI failure in `FileWatching`

[giordano]

https://buildkite.com/julialang/julia-master/builds/38447#0190e659-69b9-40b5-b192-d164a3294323/838-1665

Error in testset FileWatching:
Test Failed at /cache/build/tester-amdci4-12/julialang/julia-master/julia-5582205718/share/julia/stdlib/v1.12/FileWatching/test/pidfile.jl:239
  Expression: 8 < t < 20
   Evaluated: 8 < 46.329898155 < 20

Offending test is

julia/stdlib/FileWatching/test/pidfile.jl

Lines 237 to 239 in 0ffbae8

	t = @elapsed f = open_exclusive("pidfile", poll_interval=3, stale_age=10)::File
	close(f)
	@test 8 < t < 20

[Keno]

Any test that tries to do timing on CI is just bad. If the system is loaded, it can block for arbitrary amounts of time.

[giordano]

Observed again today https://buildkite.com/julialang/julia-master/builds/50125#0198ed1a-3b19-41da-9f8f-3ee4e778bd4f/909-1744

Error in testset FileWatching:
Test Failed at /Users/julia/.julia/scratchspaces/a66863c6-20e8-4ff4-8a62-49f30b1f605e/agent-cache/default-honeycrisp-XC9YQX9HH2.0/build/default-honeycrisp-XC9YQX9HH2-0/julialang/julia-master/julia-cee7337f21/share/julia/stdlib/v1.13/FileWatching/test/pidfile.jl:239
  Expression: 8 < t < 20
   Evaluated: 8 < 20.009907833 < 20