A couple of unit test cases are flaky

[liuchangyan]

Describe the bug There are two unit test can't pass in [eventing-kafka-broker ] and [ eventing-natss ] (1) The Error of Unit Test (eventing-kafka-broker, knative-sandbox) is

test/e2e_new/resources/kafkasink/kafkasink_test.go:44:36: not enough arguments in call to manifest.ExecuteYAML
	have (embed.FS, map[string]string, map[string]interface {})
	want (context.Context, fs.FS, map[string]string, map[string]interface {})

(2) The Error of Unit Test (eventing-natss, knative-sandbox) is

test/e2e/main_test.go:51:38: not enough arguments in call to "knative.dev/reconciler-test/pkg/environment".ProduceImages
	have ()
	want (context.Context)

Expected behavior The test cases can consistently pass.

To Reproduce Run CI and see unit-tests job

[pierDipi]

@cardil is working on some PRs similar to https://github.com/knative/eventing/commit/c8435ed74ba8716c38811382b6284ab090dfbf7b to fix these issues.