Use checkbox on boolean credential fields

[jyeshe]

Notes for the reviewer

Changes the input for boolean credential fields to use a checkbox. This change affects both a new credential as well as the settings credentials editor.

Validation steps

1. Select or create a workflow
2. Click on a job and create a new PostgreSQL credential.
3. Fill all the fields and check "Use SSL"
4. Save
5. On main menu, go to Settings->Credentials
6. Click on edit the credential
7. See that "Use SSL" is checked and now uncheck it and check the "Allow self-signed certificate"
8. Save
9. Click on edit again and find that only "Allow self-signed certificate" is checked

Related issue

Fixes #1430

Review checklist

• I have performed a self-review of my code
• I have verified that all appropriate authorization policies have been implemented and tested
• If needed, I have updated the changelog
• Product has QA'd this feature

[codecov]

Codecov Report

Attention: 7 lines in your changes are missing coverage. Please review.

Comparison is base (2fb3d25) 87.79% compared to head (d602896) 87.68%.

❗ Current head d602896 differs from pull request most recent head 6414bec. Consider uploading reports for the commit 6414bec to get more accurate results

Files	Patch %	Lines
...live/credential_live/json_schema_body_component.ex	65.00%	7 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1513      +/-   ##
==========================================
- Coverage   87.79%   87.68%   -0.12%     
==========================================
  Files         216      216              
  Lines        6539     6537       -2     
==========================================
- Hits         5741     5732       -9     
- Misses        798      805       +7     

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[taylordowns2000]

this works and i'll get it in, but there's another issue here. all values are being written to the DB as strings and sent to the worker as strings too.