fix: Return all visible events when no program specified [TECH-1663]

[muilpp]

When no program present in /events, we need to return everything visible to the user according to its search scope and capture scope, that means:

• events in open or audited programs in search scope
• events in open or audited programs in capture scope
• events in protected or closed programs in capture scope

The changes are applied to both the new and old API.
Ticket: https://dhis2.atlassian.net/browse/TECH-1663

[enricocolasante]

Just a style suggestion

[enricocolasante]

Would it make sense to move
mapSqlParameterSource.addValue(COLUMN_ORG_UNIT_PATH, params.getOrgUnit().getPath()); mapSqlParameterSource.addValue(COLUMN_USER_UID, user.getUid());

to getOrgUnitSql method and remove the addValue operation from the single methods?
It seems to me that it would simplify the code quite a bit even if we will end up with a value in the parameter source that is not used

[muilpp]

The problem with that would be that modes CAPTURE and ACCESSIBLE don't have an orgUnit in the request, so calling params.getOrgUnit().getPath() in getOrgUnitSql would result in a NPE for these two cases.

Also, there's the scheduler running tasks with a null user. Since it's a system user, we assume it will use the mode ALL, but in that case calling user.getUid() would fail too.

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

0.0% Coverage
0.0% Duplication

[codecov]

Codecov Report

Merging #15549 (252ad18) into master (421fc21) will increase coverage by 0.00%.
Report is 2 commits behind head on master.
The diff coverage is 96.42%.

@@            Coverage Diff            @@
##             master   #15549   +/-   ##
=========================================
  Coverage     66.22%   66.22%           
- Complexity    31234    31237    +3     
=========================================
  Files          3485     3485           
  Lines        129764   129769    +5     
  Branches      15141    15141           
=========================================
+ Hits          85931    85937    +6     
+ Misses        36750    36749    -1     
  Partials       7083     7083           

Flag	Coverage Δ
integration	49.77% <96.42%> (-0.01%)	⬇️
integration-h2	32.41% <0.00%> (-0.01%)	⬇️
unit	30.33% <7.14%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
.../dxf2/deprecated/tracker/event/JdbcEventStore.java	49.42% <100.00%> (+0.13%)	⬆️
...hisp/dhis/tracker/export/event/JdbcEventStore.java	85.41% <93.33%> (+0.03%)	⬆️

... and 4 files with indirect coverage changes

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