FI-2688: Migrate template to HL7 validator wrapper

[dehall]

Summary

Update the "inferno new" template to use the HL7 validator wrapper, as in all of our test kits. One notable difference here is the inferno validator-wrapper and validator UI are not commented out, they are left as-is, so this is mostly just addition other than changing the test suite validator block to fhir_resource_validator.

Corresponding changes to the docs are at: inferno-framework/inferno-framework.github.io#32

Testing Guidance

Re-generate the template with bundle exec inferno new inferno-template --author "Inferno Template" and it will be in ./inferno-template
Sample patient tests should pass, the validator UI should still work as well at http://localhost/validator/ .
YAML to run against reference server:

- name: url
  title: FHIR Server Base Url
  type: text
  value: https://inferno.healthit.gov/reference-server/r4
- name: credentials
  optional: true
  title: OAuth Credentials
  type: oauth_credentials
  value:
    access_token: SAMPLE_TOKEN
    refresh_token: ''
    expires_in: ''
    client_id: ''
    client_secret: ''
    token_url: ''
- name: patient_id
  title: Patient ID
  type: text
  value: '85'

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.21%. Comparing base (85183c0) to head (47d6bc0).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #492      +/-   ##
==========================================
- Coverage   80.23%   80.21%   -0.02%     
==========================================
  Files         240      240              
  Lines       11896    11900       +4     
  Branches     1163     1163              
==========================================
+ Hits         9545     9546       +1     
- Misses       1691     1694       +3     
  Partials      660      660              

Flag	Coverage Δ
backend	93.63% <ø> (-0.08%)	⬇️
frontend	74.22% <ø> (ø)

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[Jammjammjamm]

The template's unit tests also need to be updated.