[Migrate][Test] Add Spotless step to check and block jUnit4 imports

[EricGao888]

Purpose of the pull request

• This PR closes: [Migrate][Test] Block explicit import of jUnit 4 library #12395

Brief change log

• Add Spotless step to check and block jUnit4 imports

Verify this pull request

• Tested manually.

[codecov-commenter]

Codecov Report

Merging #12398 (c95bd8a) into dev (b7bd8d7) will decrease coverage by 0.00%.
The diff coverage is n/a.

❗ Current head c95bd8a differs from pull request most recent head 4ff8912. Consider uploading reports for the commit 4ff8912 to get more accurate results

@@             Coverage Diff              @@
##                dev   #12398      +/-   ##
============================================
- Coverage     38.93%   38.92%   -0.01%     
+ Complexity     4178     4175       -3     
============================================
  Files          1040     1040              
  Lines         38805    38796       -9     
  Branches       4460     4460              
============================================
- Hits          15107    15100       -7     
  Misses        21930    21930              
+ Partials       1768     1766       -2     

Impacted Files	Coverage Δ
.../org/apache/dolphinscheduler/api/enums/Status.java	100.00% <ø> (ø)
...api/service/impl/ProcessDefinitionServiceImpl.java	34.85% <ø> (+0.13%)	⬆️
...olphinscheduler/plugin/task/api/TaskConstants.java	0.00% <ø> (ø)
...erver/master/processor/queue/TaskEventService.java	69.64% <0.00%> (-10.72%)	⬇️
...r/plugin/task/sqoop/parameter/SqoopParameters.java	55.12% <0.00%> (-1.29%)	⬇️
...pache/dolphinscheduler/common/utils/DateUtils.java	74.54% <0.00%> (+0.60%)	⬆️

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[kezhenxu94]

LGTM