Fix ambiguity test failure when arrayops and LinearAlgebra run on the same worker (#28836)

Author: mbauman

test/arrayops.jl

@@ -2455,13 +2455,13 @@ end
 
 # Ensure we can hash strange custom structs — and they hash the same in arrays
 struct totally_not_five26034 end
-Base.isequal(::totally_not_five26034, x)=isequal(5,x);
-Base.isequal(x, ::totally_not_five26034)=isequal(5,x);
+Base.isequal(::totally_not_five26034, x::Number)=isequal(5,x);
+Base.isequal(x::Number, ::totally_not_five26034)=isequal(5,x);
 Base.isequal(::totally_not_five26034, ::totally_not_five26034)=true;
 Base.hash(::totally_not_five26034, h::UInt)=hash(5, h);
 import Base.==
-==(::totally_not_five26034, x)= (5==x);
-==(x,::totally_not_five26034)= (5==x);
+==(::totally_not_five26034, x::Number)= (5==x);
+==(x::Number,::totally_not_five26034)= (5==x);
 ==(::totally_not_five26034,::totally_not_five26034)=true;
 @testset "issue #26034" begin
     n5 = totally_not_five26034()