dubbo2.7.19配置文件配置scan.base-packages

* Dubbo version: 2.7.19
application.yml文件配置了dubbo.scan.base-packages=xxxx.service不生效，但在启动类里写入@DubboComponentScan才生效，2.7.8没有这个问题

Start by comparing Dubbo 2.7.19 handling of the application.yml setting dubbo.scan.base-packages with the startup class's @DubboComponentScan behavior, and then compare the same path in 2.7.8. The change is done when the configured package is scanned and services are registered without adding the annotation to the startup class.

Written by the indexing model from the issue text.