Reenable bundle reuse test

No matter what I try I cannot get this test to fail anymore. Tried to
increase the iterations to 100 without getting any fails, not in Github
Actions or locally.
Based on that the test is reenabled, and then it should be monitored
if the build becomes unstable again.

Signed-off-by: Kim Christensen <kimworking@gmail.com>

tests/integration/build_test.go

@@ -125,11 +125,10 @@ func TestRebuild(t *testing.T) {
 	// This is a regression test for a bug where the manifest would be considered out-of-date when nothing had changed
 	// caused by us using a go map when comparing the mixins used in the bundle, which has inconsistent sort order...
 
-	//todo: This test is flaky still and upsetting CI
-	// for i := 0; i < 5; i++ {
-	// 	_, output = test.RequirePorter("explain")
-	// 	tests.RequireOutputContains(t, output, "Bundle is up-to-date!", "expected the previous build to be reused")
-	// }
+	for i := 0; i < 10; i++ {
+		_, output = test.RequirePorter("explain")
+		tests.RequireOutputContains(t, output, "Bundle is up-to-date!", "expected the previous build to be reused")
+	}
 
 	bumpBundle()