fix: flaky test (#968)

`TestConvertToStructs` was occasionally failing because it was expecting `range` over a `map` to be a consistent order, but per [spec]:

> The iteration order over maps is not specified and is not guaranteed to be the same from one iteration to the next.

Uses `ElementsMatch` so the test passes even when the order of elements is different.

[spec]: https://go.dev/ref/spec#RangeClause

Author: ryepup

api/grpc/mpi/v1/helpers_test.go

@@ -65,7 +65,7 @@ func TestConvertToStructs(t *testing.T) {
 		t.Run(tt.name, func(t *testing.T) {
 			got, err := ConvertToStructs(tt.input)
 
-			assert.Equal(t, tt.expected, got)
+			assert.ElementsMatch(t, tt.expected, got)
 			assert.Equal(t, tt.wantErr, err != nil)
 		})
 	}