[ARCTIC-1596][Flink]: turn on all unit tests annotated with @Ignore

[lklhdu]

Why are the changes needed?

fix #1596

Brief change log

• remove @ignore in Flink module unit test
• The flink 1.12, 1.14 and 1.15 versions are affected.

How was this patch tested?

• Add some test cases that check the changes thoroughly including negative and positive cases if possible

• Add screenshots for manual tests if appropriate

• Run test locally before making a pull request

Documentation

• Does this pull request introduces a new feature? (yes / no)
• If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.03 ⚠️

Comparison is base (70663c7) 48.23% compared to head (fa5d09c) 48.20%.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1639      +/-   ##
============================================
- Coverage     48.23%   48.20%   -0.03%     
  Complexity     3533     3533              
============================================
  Files           463      463              
  Lines         24753    24753              
  Branches       2529     2529              
============================================
- Hits          11939    11933       -6     
- Misses        11714    11720       +6     
  Partials       1100     1100              

Flag	Coverage Δ
core	48.11% <ø> (-0.03%)	⬇️
trino	48.64% <ø> (-0.03%)	⬇️

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see 5 files with indirect coverage changes

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