Add NewSiteReference to toString() in AllocationSiteInNode

[khatchad]

The return value of com.ibm.wala.ipa.callgraph.propagation.AllocationSiteInNode.toString() now includes its com.ibm.wala.classLoader.NewSiteReference. I used the toString() method of AllocationSite as a guide.

Fixes #1733.

[liblit]

Thanks, @khatchad!

When this change is approved and squashed into master, the description of this PR will become the commit message. The current description, "Fixes #1733", will be completely opaque if, for example, we were ever to migrate off of GitHub. @khatchad, would you please expand that description to explain the purpose of the change even if the #1733 link is not available? Feel free to copy and paste anything from the original #1733 bug report. And feel free to keep the #1733 reference as part of the description. It just shouldn't be the entire description.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 50.22%. Comparing base (913a6e1) to head (897a0e3).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1735      +/-   ##
============================================
- Coverage     50.22%   50.22%   -0.01%     
+ Complexity    12653    12652       -1     
============================================
  Files          1365     1365              
  Lines         85189    85190       +1     
  Branches      14726    14726              
============================================
- Hits          42788    42783       -5     
- Misses        37604    37605       +1     
- Partials       4797     4802       +5     

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[github-actions]

Test Results

  841 files  ±0    841 suites  ±0   5h 50m 36s ⏱️ + 51m 52s
  789 tests ±0    770 ✅ ±0   19 💤 ±0  0 ❌ ±0 
5 407 runs  ±0  5 272 ✅ ±0  135 💤 ±0  0 ❌ ±0 

Results for commit 897a0e3. ± Comparison against base commit 913a6e1.

♻️ This comment has been updated with latest results.