chore: add seata sentinel starter & rename tracing starter

[conghuhu]

What is the purpose of the change

Brief changelog

• add seata & sentinel starter
• rename tracing starter to xxx-spring-boot-starter（After PR merge, I will synchronously modify dubbo samples）

Verifying this change

Checklist

• Make sure there is a GitHub_issue field for the change (usually before you start working on it). Trivial changes like typos do not require a GitHub issue. Your pull request should address just this issue, without pulling in other changes - one PR resolves one issue.
• Each commit in the pull request should have a meaningful subject line and body.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Check if is necessary to patch to Dubbo 3 if you are work on Dubbo 2.7
• Write necessary unit-test to verify your logic correction, more mock a little better when cross module dependency exist. If the new feature or significant change is committed, please remember to add sample in dubbo samples project.
• Add some description to dubbo-website project if you are requesting to add a feature.
• GitHub Actions works fine on your own branch.
• If this contribution is large, please follow the Software Donation Guide.

[conghuhu]

@chickenlj PTAL

[codecov-commenter]

Codecov Report

Merging #12543 (208d2a6) into 3.2 (55484cb) will decrease coverage by 0.40%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                3.2   #12543      +/-   ##
============================================
- Coverage     69.60%   69.21%   -0.40%     
+ Complexity      318        2     -316     
============================================
  Files          3496     1637    -1859     
  Lines        165135    67523   -97612     
  Branches      27769     9907   -17862     
============================================
- Hits         114938    46733   -68205     
+ Misses        40196    16262   -23934     
+ Partials      10001     4528    -5473     

see 1880 files with indirect coverage changes

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[chickenlj]

LGTM.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information