tests: reduce amount of nginx re-starts

tests/test_otel.py

@@ -319,7 +319,7 @@ def span_list(http_ver, spans):
     scope="module",
 )
 @pytest.mark.usefixtures("otelcollector", "nginx")
-class TestOTel:
+class TestOTelGenerateSpans:
     @pytest.mark.parametrize(
         "url, headers, response",
         [
@@ -406,7 +406,14 @@ async def test_do_requests(self, http_ver, logger, url, headers, response):
         assert r.status_code == 200
         assert r.text == response
 
-    @pytest.mark.depends(on=["test_do_requests"])
+
+@pytest.mark.parametrize("http_ver", [1, 2, 3], ids=["https", "http2", "quic"])
+class TestOTelSpans:
+    async def test_wait_for_last_batch(self, http_ver):
+        if http_ver == 3:
+            await asyncio.sleep(5)
+
+    @pytest.mark.depends(on=["test_wait_for_last_batch"])
     @pytest.mark.parametrize(
         "batch, size",
         [(0, 10), (1, 10), (2, 10)],