Turn common.io xcom exception into OptionalProviderFeatureException (a…

…pache#38543)

The common.io xcom exception should be Optional Provider Feature.
When it's not, it's raising a compatiblity error when run on Airflow
< 2.9.0.

airflow/providers/common/io/xcom/__init__.py

@@ -18,6 +18,8 @@
 
 import packaging.version
 
+from airflow.exceptions import AirflowOptionalProviderFeatureException
+
 try:
     from airflow import __version__ as airflow_version
 except ImportError:
@@ -26,7 +28,7 @@
 if packaging.version.parse(packaging.version.parse(airflow_version).base_version) < packaging.version.parse(
     "2.9.0"
 ):
-    raise RuntimeError(
+    raise AirflowOptionalProviderFeatureException(
         "The package xcom backend feature of `apache-airflow-providers-common-io` needs "
         "Apache Airflow 2.9.0+"
     )