CAMEL-21196: modernize exception-based assertions in camel-clickup

Replace fail(e) pattern with throw new AssertionError for modernized exception handling.

Author: orpiske

components/camel-clickup/src/test/java/org/apache/camel/component/clickup/ClickUpWebhookRegistrationTest.java

@@ -81,7 +81,7 @@ public void testAutomaticRegistration() throws Exception {
 
                 assertInstanceOf(WebhookCreationCommand.class, command);
             } catch (IOException e) {
-                fail(e);
+                throw new AssertionError("Failed to parse recorded message", e);
             }
 
             mockProcessor.clearRecordedMessages();