Replace all data in a research study with data from CT.gov

[dmpotter44]

Rather than attempt to update data from the matching service, this replaces it with a function that instead replaces any existing data with data from the ClinicalTrials.gov API. (Note that matching services should still attempt to fill in as much data as they can, as the CT.gov data can only be used if the trial exists on CT.gov.)

[codecov]

Codecov Report

Attention: 6 lines in your changes are missing coverage. Please review.

Comparison is base (2872f1e) 97.01% compared to head (14bd619) 97.08%.

Files	Patch %	Lines
src/study-fhir-converter.ts	94.17%	0 Missing and 6 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #45      +/-   ##
==========================================
+ Coverage   97.01%   97.08%   +0.06%     
==========================================
  Files          14       14              
  Lines         938      926      -12     
  Branches      285      272      -13     
==========================================
- Hits          910      899      -11     
  Misses          2        2              
+ Partials       26       25       -1     

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