envtest: Not respecting custom apiserver/etcd paths

[ahmetb]

It appears if I provide custom paths to envtest.Environment struct it ignores them. Minimal repro:

func TestNewEnvironment(t *testing.T) {
	testEnv := &envtest.Environment{
		ControlPlane: envtest.ControlPlane{
			APIServer: &envtest.APIServer{
				Path: "/Users/abalkan/workspace/my-project/bin/kubebuilder_1.30.3_darwin_amd64/kube-apiserver",
			},
			Etcd: &envtest.Etcd{
				Path: "/Users/abalkan/workspace/my-project/bin/kubebuilder_1.30.3_darwin_amd64/etcd",
			},
		},
	}

	// Start the control plane
	cfg, err := testEnv.Start()
	if err != nil {
		t.Fatalf("Failed to start control plane: %v", err)
	}
}

Gives error:

Failed to start control plane: unable to start control plane itself: failed to start the controlplane. retried 5 times: fork/exec /usr/local/kubebuilder/bin/etcd: no such file or directory

so it's looking at the wrong path despite the provided path override.

Currently one has to do t.Setenv("TEST_ASSET_KUBE_APISERVER", "...") to make this work I think, which is a little less than ideal.

[alvaroaleman]

Fixed in #3372