Add API endpoint for request type key of submission template

[wendyyang]

Closes #

Changes proposed in this pull request

Add request type key to submission template API, also allow filter by template uuid

Instructions for Reviewers

[All PRs] - Confirm PR template filled
[Feature Branches] - Review code
[Production Merges to main]
    - Check story numbers included
    - Check for debug code
    - Check version

[codecov]

Codecov Report

❌ Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 87.21%. Comparing base (f5ed910) to head (b972d26).
⚠️ Report is 6 commits behind head on develop.

Files with missing lines	Patch %	Lines
...p/resources/api/v2/submission_template_resource.rb	66.66%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #5605      +/-   ##
===========================================
- Coverage    87.25%   87.21%   -0.04%     
===========================================
  Files         1460     1460              
  Lines        32966    33030      +64     
  Branches      3465     3479      +14     
===========================================
+ Hits         28764    28808      +44     
- Misses        4181     4201      +20     
  Partials        21       21              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[StephenHulme]

Looks good, minor comment

[StephenHulme]

Would you please add a more detailed docstring? We try keep out API documentation top-notch since it is used by other developers and applications.

SampleMetadataResource has a nice example:

      # @!method filter_sample_id(value)
      #   Filters sample metadata by `sample_id`, allowing users to retrieve metadata for a specific sample.
      #
      #   @example Filtering by sample_id
      #     GET /api/v2/sample_metadata?filter[sample_id]=456
      #
      #   @param value [String] The sample ID to filter by.
      #   @return [SampleMetadataResource] The metadata records matching the given sample ID.