add UNIQUE KEY on linkis_ps_dm_datasource_env

[chenmutime]

What is the purpose of the change

EngineConn-Core defines the the abstractions and interfaces of the EngineConn core functions.
The Engine Service in Linkis 0.x is refactored, EngineConn will handle the engine connection
and session management.

Related issues/PRs

Related issues: #590
Related pr:#591

Brief change log

• Define the core abstraction and interfaces of the EngineConn Factory;
• Define the core abstraction and interfaces of Executor Manager.

Checklist

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

[codecov]

Codecov Report

Merging #3197 (1bfc2cf) into dev-1.3.1 (7f7b8f5) will decrease coverage by 0.09%.
The diff coverage is n/a.

@@               Coverage Diff               @@
##             dev-1.3.1    #3197      +/-   ##
===============================================
- Coverage        16.41%   16.31%   -0.10%     
+ Complexity        1387     1381       -6     
===============================================
  Files              779      779              
  Lines            25353    25353              
  Branches          3603     3603              
===============================================
- Hits              4161     4137      -24     
- Misses           20647    20686      +39     
+ Partials           545      530      -15     

Impacted Files	Coverage Δ
...apache/linkis/scheduler/future/BDPFutureTask.scala	20.00% <0.00%> (-50.00%)	⬇️
...la/org/apache/linkis/scheduler/queue/UserJob.scala	16.66% <0.00%> (-16.67%)	⬇️
.../scala/org/apache/linkis/scheduler/queue/Job.scala	9.29% <0.00%> (-6.20%)	⬇️
...s/scheduler/queue/fifoqueue/FIFOUserConsumer.scala	36.79% <0.00%> (-1.89%)	⬇️
...apache/linkis/scheduler/queue/LoopArrayQueue.scala	30.90% <0.00%> (-1.82%)	⬇️
...apache/linkis/scheduler/queue/SchedulerEvent.scala	51.35% <0.00%> (ø)

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