sentinel-cluster 1.80 Embedded usage issues

sentinel-cluster 1.80 Embedded usage
## Issue Description
Sentinel + NACOS cluster current-limiting embedded mode,

The current solution is to implement the InitFunc interface and write the NACOS address and namespace into the code.

Type: feature request

### Describe what happened (or what feature you want)
Is there any other way to read the nocas address in a configuration file like application.yml

Other injection methods have been tried like read properties , resulting in cluster mode flow limiting does not work

### Tell us your environment
jdk:1.8
springboot:2.2.6.RELEASE
sentinel-datasource-nacos: 1.80
spring-cloud-starter-alibaba-sentinel:2.2.5.RELEASE

### Anything else we need to know?

谢谢大佬

Start at the InitFunc implementation and the embedded cluster setup, then inspect how application.yml properties are made available; the issue reports that other property-injection attempts do not make cluster flow limiting work. Done means the Nacos address and namespace can be supplied from application.yml and embedded cluster limiting works under the listed Java 8 and Spring Boot 2.2.6 environment.

Written by the indexing model from the issue text.