fix: Fix five different issues with this one PR

[heath-freenome]

Reasons for making this change

fixes: #3302 (borrowing the implementation from #3306), #3314, #3315, #3316 and #3317

• In @rjsf/antd, pass the new registry prop into all of the ButtonTemplates usages, filtering it out when spreading props into the underlying button implementation
  • Also updated the CheckboxWidget tests to verify the label is passed correctly
• In @rjsf/bootstrap-4, pass the new registry prop into all of the ButtonTemplates usages, filtering it out when spreading props into the underlying button implementation
  • Updated CheckboxWidget to get the required state of the checkbox from the schemaRequiresTrueValue() utility function rather than the required prop
  • Also updated the CheckboxWidget tests to verify the label is passed correctly
  • Also, remove the one off tests for AddButton and CheckboxWidget since they are duplicated elsewhere
• In @rjsf/chakra-ui, pass the new registry prop into all of the ButtonTemplates usages, filtering it out when spreading props into the underlying button implementation
  • Updated CheckboxWidget to get the required state of the checkbox from the schemaRequiresTrueValue() utility function rather than the required prop
  • Also updated the CheckboxWidget tests to verify the label is passed correctly
• In @rjsf/core, pass the new registry prop into all of the ButtonTemplates usages, filtering it out when spreading props into the underlying button implementation
  • Also, passed registry into the SubmitButton inside of the Form as part of this fix
  • Updated ArrayField to pass the new totalItems prop to the ArrayFieldItemTemplate instances
    • Also refactored the near duplicate logic for onAddClick and onAddIndexClick into a new _handleAddClick() function
• In @rjsf/fluent-ui, pass the new registry prop into all of the ButtonTemplates usages, filtering it out when spreading props into the underlying button implementation
  • Also updated the CheckboxWidget tests to verify the label is passed correctly
• In @rjsf/material-ui, pass the new registry prop into all of the ButtonTemplates usages, filtering it out when spreading props into the underlying button implementation
  • Also updated the CheckboxWidget tests to verify the label is passed correctly
• In @rjsf/mui, pass the new registry prop into all of the ButtonTemplates usages, filtering it out when spreading props into the underlying button implementation
  • Also updated the CheckboxWidget tests to verify the label is passed correctly
• In @rjsf/semantic-ui, pass the new registry prop into all of the ButtonTemplates usages, filtering it out when spreading props into the underlying button implementation
  • Updated CheckboxWidget to get the required state of the checkbox from the schemaRequiresTrueValue() utility function rather than the required prop
  • Also fixed the CheckboxWidget missing label issue
  • Also updated the CheckboxWidget tests to verify the label is passed correctly
• In @rjsf/utils, updated the SubmitButtonProps and IconButtonProps to add required registry prop
  • Updated the ArrayFieldTemplateItemType to add the new totalItems prop
• Updated the custom-templates.md file to add documentation for the new props added to the types
• Updated the CHANGELOG.md file accordingly

Checklist

• I'm updating documentation
  • I've checked the rendering of the Markdown text I've added
• I'm adding or updating code
  • I've added and/or updated tests. I've run npm run test:update to update snapshots, if needed.
  • I've updated docs if needed
  • I've updated the changelog with a description of the PR
• I'm adding a new feature
  • I've updated the playground with an example use of the feature