Add Field Template support for Layout Builder blocks

Problem/Motivation

When DS field templates are enabled, the field template form renders on Layout Builder FieldBlocks but doesn't work.

Steps to reproduce

• Enable DS Field Templates and the Layout Builder module
• Enable Layout Builder on a Content type and click "Manage Layout"
• Click "+Add Block" on a section and add any field block from the "Content field" section
• Change the field template select - the form won't update with the selected field template settings

Proposed resolution

1. Update the ds field template-related form and preprocessors to sniff out when the field is being rendered by Layout Builder and handle accordingly
2. Add a setting to disable field templates in layout builder entirely. There are likely cases where you don't need field template support in layout builder but still want it on the Manage Display page.

Patch Incoming!