[FOLLOWUP] Delete hdfs shuffle data files using proxy user

[zuston]

What changes were proposed in this pull request?

Delete shuffle data files stored on secured hdfs using proxy user

Why are the changes needed?

In previous PR #53, we introduce the proxy user for shuffle server to write shuffle data to HDFS.
But I ignored that the shuffle server should also delete these files by the way of proxy user.

Does this PR introduce any user-facing change?

No

How was this patch tested?

Manual tests on kerberos HDFS cluster, and unit tests.

[codecov-commenter]

Codecov Report

Merging #170 (4584f67) into master (abb9215) will increase coverage by 0.03%.
The diff coverage is 50.00%.

@@             Coverage Diff              @@
##             master     #170      +/-   ##
============================================
+ Coverage     58.25%   58.29%   +0.03%     
- Complexity     1261     1262       +1     
============================================
  Files           158      158              
  Lines          8397     8397              
  Branches        779      779              
============================================
+ Hits           4892     4895       +3     
+ Misses         3253     3251       -2     
+ Partials        252      251       -1     

Impacted Files	Coverage Δ
...he/uniffle/server/storage/MultiStorageManager.java	37.50% <0.00%> (ø)
...storage/handler/impl/HdfsShuffleDeleteHandler.java	0.00% <0.00%> (ø)
...e/storage/handler/impl/LocalFileDeleteHandler.java	0.00% <ø> (ø)
.../org/apache/uniffle/server/ShuffleTaskManager.java	64.60% <100.00%> (ø)
...che/uniffle/server/storage/HdfsStorageManager.java	92.68% <100.00%> (ø)
...he/uniffle/server/storage/LocalStorageManager.java	61.53% <100.00%> (ø)
...org/apache/uniffle/server/ShuffleFlushManager.java	79.32% <0.00%> (+1.67%)	⬆️

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[zuston]

PTAL @jerqi @colinmjj

[jerqi]

LGTM, merged. Thanks @zuston