add READNE.md and executor tests for trino

[ws00428637]

What is the purpose of the change

Add some guide for Trino EngineConn plugin.

Related issues/PRs

Related issues: #2687 Related pr:#2639

Brief change log

• Add Trino executor test class;
• Add Trino README.md;
• Fix some configurations for Trino.

Checklist

• [x] I have read the Contributing Guidelines on pull requests.
• [x] I have explained the need for this PR and the problem it solves
• [x] I have explained the changes or the new features added to this PR
• [x] I have added tests corresponding to this change
• [x] I have updated the documentation to reflect this change
• [x] I have verified that this change is backward compatible (If not, please discuss on the Linkis mailing list first)
• [x] If this is a code change: I have written unit tests to fully verify the new behavior.