OBPIH-7610 restructure date formatter and parser classes away from DateUtil

[ewaterman]

:sparkles: Description of Change

Link to GitHub issue or Jira ticket: https://pihemr.atlassian.net/browse/OBPIH-7610

Description: Sorry once again for a long PR. 95% of it is just moving classes into new places so I'm going to go over it in tech huddle because a full review wouldn't be worth the time IMO.

I got fed up with the structure of all these asX methods being in DateUtil so I moved them into individual XParser classes. That does a better job of encapsulating the logic and allows us to do the Date -> Instant/LocalDate refactor easier (see my comments in the individual files for details)

[codecov[bot]]

Codecov Report

:x: Patch coverage is 38.16794% with 162 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 9.81%. Comparing base (1bb7314) to head (8f0caf6). :warning: Report is 122 commits behind head on develop.

Files with missing lines	Patch %	Lines
...y/org/pih/warehouse/core/date/InstantParser.groovy	51.66%	19 Missing and 10 partials :warning:
...pih/warehouse/core/date/ZonedDateTimeParser.groovy	46.80%	16 Missing and 9 partials :warning:
...y/org/pih/warehouse/core/date/DateFormatter.groovy	45.94%	15 Missing and 5 partials :warning:
.../pih/warehouse/core/date/JavaUtilDateParser.groovy	34.48%	9 Missing and 10 partials :warning:
...org/pih/warehouse/core/date/LocalDateParser.groovy	36.84%	7 Missing and 5 partials :warning:
...oovy/org/pih/warehouse/core/date/DateParser.groovy	11.11%	8 Missing :warning:
...ih/warehouse/core/date/DateFormatterContext.groovy	0.00%	3 Missing and 4 partials :warning:
...h/warehouse/core/date/JavaUtilDateFormatter.groovy	50.00%	6 Missing and 1 partial :warning:
...ices/org/pih/warehouse/report/ReportService.groovy	0.00%	6 Missing :warning:
...ces/org/pih/warehouse/core/DashboardService.groovy	0.00%	4 Missing :warning:
... and 14 more

Additional details and impacted files

@@             Coverage Diff              @@
##             develop   #5661      +/-   ##
============================================
+ Coverage       9.12%   9.81%   +0.69%     
- Complexity      1170    1352     +182     
============================================
  Files            701     725      +24     
  Lines          45281   45942     +661     
  Branches       10851   10973     +122     
============================================
+ Hits            4131    4510     +379     
- Misses         40497   40725     +228     
- Partials         653     707      +54     

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[alannadolny]

@ewaterman Does this PR have a ticket?

[ewaterman]

I'm merging this PR to unblock my other work that I'm trying to wrap up before the break but as usual please feel free to leave review comments and I can address in a new PR.