Deprecation: #95456 - Deprecate legacy form templates 

See forge#95456

Description 

Using the legacy form template / partial variants residing in EXT:form/Resources/Private/Frontend/Templates and EXT:form/Resources/Private/Frontend/Partials is deprecated. The legacy templates will be removed in v13.

Impact 

No deprecation is logged since it would flood the logs.

Affected Installations 

Installations using custom templates for form elements.

Migration 

Set your form rendering option "templateVariant" within the form setup from "version1" to "version2" to use the future default templates.

TYPO3:
  CMS:
    Form:
      prototypes:
        standard:
          formElementsDefinition:
            Form:
              renderingOptions:
                templateVariant: version2
Copied!

Migrate your templates / partials to make them compatible with the ones stored in EXT:form/Resources/Private/FrontendVersion2.