[Improve][Sls] Add sls sink connector、e2e、doc

[XenosK]

Thank you for contributing to SeaTunnel! Please make sure that your code changes
are covered with tests. And in case of new features or big changes
remember to adjust the documentation.

Feel free to ping committers for the review!

Contribution Checklist

• Make sure that the pull request corresponds to a GITHUB issue.
• Name the pull request in the form "[Feature] [component] Title of the pull request", where Feature can be replaced by Hotfix, Bug, etc.
• Minor fixes should be named following this pattern: [hotfix] [docs] Fix typo in README.md doc.
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Purpose of this pull request

This pull request adds sink connector for sls

Does this PR introduce any user-facing change?

no

How was this patch tested?

e2e run locally

Check list

• If any new Jar binary package adding in your PR, please add License Notice according
  New License Guide
• If necessary, please update the documentation to describe the new feature. https://github.com/apache/seatunnel/tree/dev/docs
• If you are contributing the connector code, please check that the following files are updated:
  1. Update plugin-mapping.properties and add new connector information in it
  2. Update the pom file of seatunnel-dist
  3. Add ci label in label-scope-conf
  4. Add e2e testcase in seatunnel-e2e
  5. Update connector plugin_config
• Update the release-note.

[XenosK]

Aliyun sls need a personally account, screenshot of successfully run ete

[Hisoka-X]

Overall LGTM. Thanks @XenosK