Add test modules and corresponding unit tests

[linghengqian]

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请认真填写，不然会直接关闭。

Enviroment

JDK Version(required):

• 17
  SpringBoot Version(required):
• 3.0.1
  dynamic-datasource-spring-boot-starter Version(required):
• 3.6.0
  druid Version(optional):
• Null.

Describe what happened

• The project's GitHub Actions lacks tests for specific features.

Expected Result:

• Add test modules and corresponding unit tests.
• Related to Dynamic Datasource not judging Jakarta EE namespace when using SPEL #471 and Some plan to write additional unit tests for the class library need GraalVM Reachability Metadata linghengqian-scratches/graalvm-trace-metadata-smoketest#1. This will first help with graalvm's nativeTest integration.

Actual Result:

If there is an exception,or aop invalid,please attach the exception trace:

Just paste your stack trace here!

Steps to reproduce

• Step 1

• Step 2

• Step 3

[linghengqian]

• I'm working on this issue.

[linghengqian]

• Once baomidou committer completes the refactoring of this project structure, I will start preparing a PR for this issue again.