Format: Intl readable datetime rewrite usages

[yookoala]

Description

• Follow up to #1758, refactor existing use if Format::dateReadable with Format::dateIntlReadable.
• Depends on #1759.

Note that the formatting strign '%e' (day of month with leading space) has no equivlant in intl module. They are all rewritten with 'd' formatter, which is only the digit without leading space. These are all the occurrence of such '%e' refactors:

• modules/Activities/activities_attendance.php
• modules/Activities/report_attendance.php
• modules/Attendance/attendance_future_byPerson.php
• modules/Planner/units_edit_deploy.php
• modules/Planner/units_edit_working.php
• modules/Reports/reporting_my.php
• modules/Reports/templates/ui/reportingCycleHeader.twig.html
• modules/Staff/coverage_planner_assign.php
• modules/Staff/report_absences_summary.php
• modules/Staff/report_subs_availability.php
• modules/Staff/report_subs_availabilityWeekly.php
• modules/Staff/src/Messages/CoveragePartial.php
• modules/Staff/src/Tables/AbsenceCalendar.php
• modules/Staff/src/Tables/CoverageCalendar.php

Motivation and Context

• See #1643

How Has This Been Tested?

• Locally
• CI environment (with the newly written tests)