FI-2347: Set radio default input

[AlyssaWang]

Summary

Fixes a bug where radio button default values weren't being set properly.

Testing Guidance

Make sure the default radio button value in SMART STU2 for client_auth_type is getting set when mounted.

Detailed Testing Procedure

1. Clone inferno-core.
2. In the Gemfile, uncomment this line: gem 'onc_certification_g10_test_kit'.
3. In demo_suite.rb, uncomment this line: require 'onc_certification_g10_test_kit'.
4. Make sure Docker is running and set up Inferno Core locally following the Running Inferno Core for Development Purposes instructions in the README. Navigate to localhost:4567/inferno/.
5. In the UI, run all tests for SMART STU2 -- you can use filler values for required fields and cancel out of the wait test.
6. Open the developer console (right click -> Inspect) and navigate to the Networks tab.
7. Look for the test_runs API call and go to the Payload tab. Inputs and their values will be printed. The radio buttons should be showing empty values for the client_auth_type or Client Authentication Method field. This is confirming that the bug is appearing.
8. Switch to the FI-2347-radio-default branch and retry steps 5-7. The same fields should now have values. This is confirming that the bug is fixed.

[codecov]

Codecov Report

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

Comparison is base (0181b6d) 77.10% compared to head (74d4225) 77.06%.

Files	Patch %	Lines
...ent/src/components/InputsModal/InputRadioGroup.tsx	14.28%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #416      +/-   ##
==========================================
- Coverage   77.10%   77.06%   -0.05%     
==========================================
  Files         218      218              
  Lines       10872    10878       +6     
  Branches     1018     1018              
==========================================
  Hits         8383     8383              
- Misses       1911     1917       +6     
  Partials      578      578              

Flag	Coverage Δ
backend	93.82% <ø> (ø)
frontend	69.70% <14.28%> (-0.06%)	⬇️

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[alisawallace]

Confirmed that bug was fixed when repeating the SMART App Launch steps that revealed the bug.