[test] precompile tests run on master 1, so may need explicit startup-file=no to pass (#59139)

Our Makefile passes this flag, which then propagates, and if any workers
are launched, they have this flag set also, but when running tests
manually via runtests.jl, it may not get set, causing some spurious
failures here.

Author: vtjnash

test/precompile.jl

@@ -1884,8 +1884,8 @@ end
 
 @testset "Precompile external abstract interpreter" begin
     dir = @__DIR__
-    @test success(pipeline(Cmd(`$(Base.julia_cmd()) precompile_absint1.jl`; dir); stdout, stderr))
-    @test success(pipeline(Cmd(`$(Base.julia_cmd()) precompile_absint2.jl`; dir); stdout, stderr))
+    @test success(pipeline(Cmd(`$(Base.julia_cmd()) --startup-file=no precompile_absint1.jl`; dir); stdout, stderr))
+    @test success(pipeline(Cmd(`$(Base.julia_cmd()) --startup-file=no precompile_absint2.jl`; dir); stdout, stderr))
 end
 
 precompile_test_harness("Recursive types") do load_path
@@ -2420,7 +2420,7 @@ precompile_test_harness("llvmcall validation") do load_path
         using LLVMCall
         LLVMCall.do_llvmcall2()
     """
-    @test readchomp(`$(Base.julia_cmd()) --pkgimages=no -E $(testcode)`) == repr(UInt32(0))
+    @test readchomp(`$(Base.julia_cmd()) --startup-file=no --pkgimages=no -E $(testcode)`) == repr(UInt32(0))
     # Now the regular way
     @eval using LLVMCall
     invokelatest() do
@@ -2500,7 +2500,7 @@ end
 
 # Issue #58841 - make sure we don't accidentally throw away code for inference
 let io = IOBuffer()
-    run(pipeline(`$(Base.julia_cmd()) --trace-compile=stderr -e 'f() = sin(1.) == 0. ? 1 : 0; exit(f())'`, stderr=io))
+    run(pipeline(`$(Base.julia_cmd()) --startup-file=no --trace-compile=stderr -e 'f() = sin(1.) == 0. ? 1 : 0; exit(f())'`, stderr=io))
     @test isempty(String(take!(io)))
 end