[AMORO-2787]: Remove memorySize option

[zhengkezhou1]

Why are the changes needed?

Close #2787.

Brief change log

• amoro-ams/amoro-ams-optimizer/amoro-optimizer-common/src/main/java/org/apache/amoro/optimizer/common/OptimizerConfig

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

[zhoujinsong]

LGTM.

Thanks for the contribution!

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 32.80%. Comparing base (f1fbfa1) to head (5b538ae).
Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #3040   +/-   ##
=========================================
  Coverage     32.80%   32.80%           
  Complexity     3827     3827           
=========================================
  Files           557      557           
  Lines         46194    46200    +6     
  Branches       6116     6120    +4     
=========================================
+ Hits          15152    15155    +3     
- Misses        29845    29848    +3     
  Partials       1197     1197           

Flag	Coverage Δ
core	32.80% <ø> (+<0.01%)	⬆️

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