Fixes https://github.com/spring-projects/spring-integration/issues/8697
The `IntegrationUtils.INTEGRATION_CONVERSION_SERVICE_BEAN_NAME` is not designed
for end-user code autowire, rather internal framework requirement
* Mark `BeanDefinition` for `IntegrationUtils.INTEGRATION_CONVERSION_SERVICE_BEAN_NAME`
as `setAutowireCandidate(false)`
(cherry picked from commit f9dc75c739)