Remove deprecated connectortest router helpers (#9278)

Signed-off-by: Bogdan Drutu <bogdandrutu@gmail.com>

.chloggen/router.yaml

@@ -0,0 +1,20 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: "breaking"
+
+# The name of the component, or a single word describing the area of concern, (e.g. otlpreceiver)
+component: "connectortest"
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: "Remove deprecated connectortest router helpers."
+
+# One or more tracking issues or pull requests related to the change
+issues: [9278]
+
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: [api]