[AMORO-2553] Parallelize reading of EQ delete files and cache them on optimizers

[zhongqishang]

Why are the changes needed?

Close #2553.

Brief change log

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 introduce a new feature? (yes / no)
• If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)

[codecov]

Codecov Report

Attention: Patch coverage is 55.60976% with 91 lines in your changes are missing coverage. Please review.

Project coverage is 34.08%. Comparing base (92730de) to head (371a390).
Report is 5 commits behind head on master.

Files	Patch %	Lines
...tease/arctic/io/reader/OptimizerExecutorCache.java	5.17%	55 Missing ⚠️
...ase/arctic/io/reader/CombinedBaseDeleteLoader.java	76.11%	13 Missing and 3 partials ⚠️
...n/java/com/netease/arctic/utils/AmoroTypeUtil.java	26.31%	13 Missing and 1 partial ⚠️
...netease/arctic/io/reader/CombinedDeleteFilter.java	84.00%	1 Missing and 3 partials ⚠️
...ic/io/reader/GenericCombinedIcebergDataReader.java	75.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #2584      +/-   ##
============================================
- Coverage     34.71%   34.08%   -0.64%     
+ Complexity     4521     4397     -124     
============================================
  Files           608      608              
  Lines         50980    50919      -61     
  Branches       6686     6678       -8     
============================================
- Hits          17700    17354     -346     
- Misses        31827    32159     +332     
+ Partials       1453     1406      -47     

Flag	Coverage Δ
core	32.36% <55.60%> (-0.71%)	⬇️
trino	50.93% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.