Fix aiohttp tests (#3771)

Remove explicit trace_id passing

Author: sl0thentr0py

MIGRATION_GUIDE.md

@@ -11,6 +11,7 @@ Looking to upgrade from Sentry SDK 2.x to 3.x? Here's a comprehensive list of wh
 - The SDK now supports Python 3.7 and higher.
 - `sentry_sdk.start_span` now only takes keyword arguments.
 - `sentry_sdk.start_span` no longer takes an explicit `span` argument.
+- `sentry_sdk.start_span` no longer takes explicit `trace_id`, `span_id` or `parent_span_id` arguments.
 - The `Span()` constructor does not accept a `hub` parameter anymore.
 - `Span.finish()` does not accept a `hub` parameter anymore.
 - The `Profile()` constructor does not accept a `hub` parameter anymore.

tests/integrations/aiohttp/test_aiohttp.py

@@ -535,8 +535,6 @@ async def handler(request):
     with start_transaction(
         name="/interactions/other-dogs/new-dog",
         op="greeting.sniff",
-        # make trace_id difference between transactions
-        trace_id="0123456789012345678901234567890",
     ) as transaction:
         client = await aiohttp_client(raw_server)
         resp = await client.get("/")
@@ -572,14 +570,21 @@ async def handler(request):
     with start_transaction(
         name="/interactions/other-dogs/new-dog",
         op="greeting.sniff",
-        trace_id="0123456789012345678901234567890",
-    ):
+    ) as transaction:
         client = await aiohttp_client(raw_server)
         resp = await client.get("/", headers={"bagGage": "custom=value"})
 
         assert (
-            resp.request_info.headers["baggage"]
-            == "custom=value,sentry-trace_id=0123456789012345678901234567890,sentry-environment=production,sentry-release=d08ebdb9309e1b004c6f52202de58a09c2268e42,sentry-transaction=/interactions/other-dogs/new-dog,sentry-sample_rate=1.0,sentry-sampled=true"
+            sorted(resp.request_info.headers["baggage"].split(","))
+            == sorted([
+                "custom=value",
+                f"sentry-trace_id={transaction.trace_id}",
+                "sentry-environment=production",
+                "sentry-release=d08ebdb9309e1b004c6f52202de58a09c2268e42",
+                "sentry-transaction=/interactions/other-dogs/new-dog",
+                "sentry-sample_rate=1.0",
+                "sentry-sampled=true",
+            ])
         )