[BUG][AQE][LocalOrder] Fix the bug of missed data due to block sorting

[zuston]

What changes were proposed in this pull request?

1. Create a extra reference copy of inFlushed blocks to avoid breaking down original sequence, if not, it will cause missed data when reading due to the sequence reading when getting memory data.

Why are the changes needed?

Fix the bug of missed data due to block sorting

Does this PR introduce any user-facing change?

No

How was this patch tested?

1. UTs

[zuston]

PTAL @jerqi

[jerqi]

LGTM, thanks @zuston , wait for CI.

[codecov-commenter]

Codecov Report

Merging #347 (bee5df2) into master (8ff41a5) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master     #347      +/-   ##
============================================
+ Coverage     58.39%   58.42%   +0.02%     
- Complexity     1552     1554       +2     
============================================
  Files           193      193              
  Lines         10761    10763       +2     
  Branches        937      937              
============================================
+ Hits           6284     6288       +4     
+ Misses         4103     4102       -1     
+ Partials        374      373       -1     

Impacted Files	Coverage Δ
...rg/apache/uniffle/server/buffer/ShuffleBuffer.java	93.04% <100.00%> (+1.89%)	⬆️

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[zuston]

Merged. Thanks @jerqi for catching this bug.

[jerqi]

@zuston Could you see the flaky test https://github.com/apache/incubator-uniffle/actions/runs/3524774587/jobs/5910627949?

[zuston]

https://github.com/apache/incubator-uniffle/actions/runs/3524774587/jobs/5910627949?

#350