[#134][FOLLOWUP] improvement(spark2): Use taskId and attemptNo as taskAttemptId

[EnricoMi]

What changes were proposed in this pull request?

Use map index and task attempt number as the task attempt id in Spark2.

Why are the changes needed?

This aligns Spark2 taskAttemptId of the blockId with Spark3.

See #1529

Does this PR introduce any user-facing change?

No.

How was this patch tested?

Existing integration tests.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 54.56%. Comparing base (ff555c5) to head (e41146c).
Report is 8 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1544      +/-   ##
============================================
+ Coverage     54.15%   54.56%   +0.40%     
- Complexity     2805     2822      +17     
============================================
  Files           431      416      -15     
  Lines         24421    22185    -2236     
  Branches       2081     2080       -1     
============================================
- Hits          13226    12105    -1121     
+ Misses        10363     9331    -1032     
+ Partials        832      749      -83     

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[github-actions]

Test Results

2 312 files  ±0  2 312 suites  ±0   4h 38m 15s ⏱️ + 1m 54s
  822 tests ±0    821 ✅ ±0   1 💤 ±0  0 ❌ ±0 
9 683 runs  +4  9 669 ✅ +4  14 💤 ±0  0 ❌ ±0 

Results for commit 0762498. ± Comparison against base commit a73dcb9.

This pull request removes 2 and adds 2 tests. Note that renamed tests count towards both.

org.apache.spark.shuffle.RssShuffleManagerTest ‑ testGetTaskAttemptIdWithSpeculation
org.apache.spark.shuffle.RssShuffleManagerTest ‑ testGetTaskAttemptIdWithoutSpeculation

org.apache.uniffle.shuffle.manager.RssShuffleManagerBaseTest ‑ testGetTaskAttemptIdWithSpeculation
org.apache.uniffle.shuffle.manager.RssShuffleManagerBaseTest ‑ testGetTaskAttemptIdWithoutSpeculation

♻️ This comment has been updated with latest results.

[jerqi]

LGTM. thanks @EnricoMi