Previously, AbstractDependsOnBeanFactoryPostProcessor was unordered
which meant that it was impossible to guarantee that another bean
factory post-processor would run after it. This prevented overriding
of the dependsOn relationships that is creates.

This commit updates AbstractDependsOnBeanFactoryPostProcessor to give
it a default order of zero. This will allow additional bean factory
post-processors to be configured with a lower precedence order (values
greater than 0) so that they run after any
AbstractDependsOnBeanFactoryPostProcessor and can override the
dependencies that it has configured.

Fixes gh-18362