update date component to antd deatpicker

[erinz2020]

update date inputs on the encounter search page to antd DatePicker to ensure consistent placeholders across browsers/regions.

PR fixes #1274

[codecov-commenter]

Codecov Report

:x: Patch coverage is 50.00000% with 18 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 8.56%. Comparing base (94c7247) to head (82e553c).

Files with missing lines	Patch %	Lines
...rontend/src/components/filterFields/DateFilter.jsx	50.00%	12 Missing :warning:
...c/components/filterFields/IndividualDateFilter.jsx	50.00%	6 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##              main   #1285      +/-   ##
==========================================
- Coverage     8.59%   8.56%   -0.04%     
  Complexity     941     941              
==========================================
  Files          623     623              
  Lines        68089   68105      +16     
  Branches     12530   12589      +59     
==========================================
- Hits          5853    5833      -20     
- Misses       61635   61671      +36     
  Partials       601     601              

Flag	Coverage Δ
backend	8.56% <50.00%> (-0.04%)	:arrow_down:
frontend	8.56% <50.00%> (-0.04%)	:arrow_down:

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