Add Refresh Resource Button to Blocks and Shortcode UI

[n7studios]

Summary

Adds refresh buttons to the Form, Form Trigger and Product blocks and shortcodes, allowing creators to refresh the list of cached resources (forms, products) after adding them to Kit, without having to navigate to Settings > Kit (example ticket).

Testing

• testRefreshResourcesOnFormBlock: Test that refreshing resources works on the Form block
• testRefreshResourcesOnFormShortcodeUsingTinyMCE: Test that refreshing resources works on the Form shortcode in the TinyMCE editor
• testRefreshResourcesOnFormShortcodeUsingTextEditor: Test that refreshing resources works on the Form shortcode in the text editor
• testRefreshResourcesOnFormTriggerBlock: Test that refreshing resources works on the Form Trigger block
• testRefreshResourcesOnFormTriggerShortcodeUsingTinyMCE: Test that refreshing resources works on the Form Trigger shortcode in the TinyMCE editor
• testRefreshResourcesOnFormTriggerShortcodeUsingTextEditor: Test that refreshing resources works on the Form Trigger shortcode in the text editor
  -testRefreshResourcesOnProductBlock: Test that refreshing resources works on the Product block
• testRefreshResourcesOnProductShortcodeUsingTinyMCE: Test that refreshing resources works on the Product shortcode in the TinyMCE editor
• testRefreshResourcesOnProductShortcodeUsingTextEditor: Test that refreshing resources works on the Product shortcode in the text editor

Checklist

• I have written a test and included it in this PR
• I have run all tests and they pass
• The code passes when running the PHP CodeSniffer
• Code meets WordPress Coding Standards for PHP, HTML, CSS and JS
• Security and Sanitization requirements have been followed
• I have assigned a reviewer or two to review this PR (if you're not sure who to assign, we can do this step for you)