chore: do not rely on re-exported cloudevents types in examples

Signed-off-by: Yurii Serhiichuk <savik.ne@gmail.com>

Author: xSAVIKx

samples/http-image-cloudevents/client.py

@@ -17,10 +17,10 @@
 import requests
 
 from cloudevents.core.bindings.http import (
-    CloudEvent,
     to_binary_event,
     to_structured_event,
 )
+from cloudevents.core.v1.event import CloudEvent
 
 resp = requests.get(
     "https://raw.githubusercontent.com/cncf/artwork/master/projects/cloudevents/horizontal/color/cloudevents-horizontal-color.png"  # noqa

samples/http-image-cloudevents/image_sample_test.py

@@ -22,11 +22,11 @@
 from PIL import Image
 
 from cloudevents.core.bindings.http import (
-    CloudEvent,
     from_http_event,
     to_binary_event,
     to_structured_event,
 )
+from cloudevents.core.v1.event import CloudEvent
 
 image_fileobj = io.BytesIO(image_bytes)
 image_expected_shape = (1880, 363)

samples/http-json-cloudevents/client.py

@@ -17,10 +17,10 @@
 import requests
 
 from cloudevents.core.bindings.http import (
-    CloudEvent,
     to_binary_event,
     to_structured_event,
 )
+from cloudevents.core.v1.event import CloudEvent
 
 
 def send_binary_cloud_event(url):

samples/http-json-cloudevents/json_sample_test.py

@@ -16,10 +16,10 @@
 from json_sample_server import app
 
 from cloudevents.core.bindings.http import (
-    CloudEvent,
     to_binary_event,
     to_structured_event,
 )
+from cloudevents.core.v1.event import CloudEvent
 
 
 @pytest.fixture