fix(#4551): adds missing identifierType=alias to the OpsGenie close URL

[AE-RobertMcDonnell]

… OpsGenieNotifier.buildUrl. This identifierType is required to successfully close an open alert when using an alias as the identifier.

closes #4551

[AE-RobertMcDonnell]

Here is a link to the issue where I reported this bug: #4551

I accidentally closed the ticket when leaving a comment. Hopefully someone with permission can reopen it for me.

[hzpz]

Not sure, why this pull request is stuck. Will try to close and then reopen it.

[hzpz]

@AE-RobertMcDonnell Thank you for your contribution! There are test failures, could you please have a look?

[AE-RobertMcDonnell]

I pushed commits that update the unit test. I see that Yash's push was rejected. The updated branch should pass tests now.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.37%. Comparing base (4f9d0ae) to head (45e7c4c).
⚠️ Report is 2459 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #4557      +/-   ##
============================================
- Coverage     83.64%   82.37%   -1.28%     
+ Complexity     1247     1220      -27     
============================================
  Files           156      164       +8     
  Lines          3644     4113     +469     
  Branches        258      257       -1     
============================================
+ Hits           3048     3388     +340     
- Misses          464      603     +139     
+ Partials        132      122      -10     

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