test: create case showcasing that a 205 breaks DoWithContext

A 205 must not return any content, so DoWithContext should handle this
case and not fail when trying to parse the JSON.

Ref: https://httpwg.org/specs/rfc9110.html#status.205

pkg/api/rest_client_test.go

@@ -303,6 +303,24 @@ func TestRESTClientPatch(t *testing.T) {
 	assert.True(t, gock.IsDone(), printPendingMocks(gock.Pending()))
 }
 
+func TestRESTClientPatchStatus205(t *testing.T) {
+	t.Cleanup(gock.Off)
+	gock.New("https://api.github.com").
+		Patch("/some/path/here").
+		BodyString(`{}`).
+		Reply(205).
+		BodyString("")
+	client, _ := NewRESTClient(ClientOptions{
+		Host:      "github.com",
+		AuthToken: "token",
+		Transport: http.DefaultTransport,
+	})
+	r := bytes.NewReader([]byte(`{}`))
+	err := client.Patch("some/path/here", r, nil)
+	assert.NoError(t, err)
+	assert.True(t, gock.IsDone(), printPendingMocks(gock.Pending()))
+}
+
 func TestRESTClientPost(t *testing.T) {
 	t.Cleanup(gock.Off)
 	gock.New("https://api.github.com").