chore: Rename executiondate to occurreddate in DB [TECH-1615]

[enricocolasante]

Following on #15642

This PR aims to replace all occurrences of executionDate in the DB and repository layer to occurredDate.
The general rule that we are using is that date fields are suffixed with At in the API and then suffixed with Date in the service and the DB layer.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

0.0% Coverage
3.6% Duplication

[codecov]

Codecov Report

Merging #15648 (045c3af) into master (21d1572) will decrease coverage by 0.01%.
The diff coverage is 59.09%.

@@             Coverage Diff              @@
##             master   #15648      +/-   ##
============================================
- Coverage     66.21%   66.21%   -0.01%     
+ Complexity    31267    31265       -2     
============================================
  Files          3487     3487              
  Lines        129904   129904              
  Branches      15170    15170              
============================================
- Hits          86013    86010       -3     
- Misses        36812    36813       +1     
- Partials       7079     7081       +2     

Flag	Coverage Δ
integration	49.77% <54.54%> (-0.01%)	⬇️
integration-h2	32.40% <13.63%> (-0.01%)	⬇️
unit	30.32% <22.72%> (ø)

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

Files	Coverage Δ
...c/main/java/org/hisp/dhis/analytics/TimeField.java	91.30% <100.00%> (ø)
...org/hisp/dhis/program/AnalyticsPeriodBoundary.java	74.57% <ø> (-3.39%)	⬇️
...ytics/event/data/DefaultEventDataQueryService.java	83.26% <ø> (ø)
...ics/event/data/EnrollmentTimeFieldSqlRenderer.java	32.75% <ø> (ø)
...ics/event/data/JdbcEnrollmentAnalyticsManager.java	51.65% <100.00%> (ø)
...nalytics/event/data/JdbcEventAnalyticsManager.java	65.94% <ø> (ø)
...nalytics/table/JdbcEventAnalyticsTableManager.java	81.66% <100.00%> (ø)
...tics/table/JdbcTeiEventsAnalyticsTableManager.java	86.60% <100.00%> (ø)
...s/tei/query/context/querybuilder/ContextUtils.java	0.00% <ø> (ø)
...ext/querybuilder/ProgramIndicatorQueryBuilder.java	1.01% <ø> (ø)
... and 17 more

... and 2 files with indirect coverage changes

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[gnespolino]

LGTM, api-e2e runs fine, so it should be good to go