requestMapper: Fix snapshot date parsing (HMS-5463)

[regexowl]

Regex was wrong, would take "2025-01-01T00:00:00.000Z" even though it's a valid RFC 3339 date.

JIRA: HMS-5463

[regexowl]

/jira-epic HMS-5279

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 82.31%. Comparing base (874f6bd) to head (439f7e4).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...nents/CreateImageWizard/utilities/requestMapper.ts	50.00%	1 Missing ⚠️

@@            Coverage Diff             @@
##             main    #2853      +/-   ##
==========================================
- Coverage   82.31%   82.31%   -0.01%     
==========================================
  Files         205      205              
  Lines       23008    23004       -4     
  Branches     2258     2258              
==========================================
- Hits        18939    18935       -4     
  Misses       4042     4042              
  Partials       27       27              

Files with missing lines	Coverage Δ
...nents/CreateImageWizard/utilities/requestMapper.ts	94.85% <50.00%> (-0.04%)	⬇️

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