Deprecation: #81434 - String Cache Frontend Deprecated 

See forge#81434

Description 

The StringFrontend cache frontend has been marked as deprecated in favor of VariableFrontend.

Impact 

Using TYPO3CMSCoreCacheFrontendStringFrontend will trigger a deprecation warning.

Affected Installations 

Any TYPO3 installation which defines any custom cache using StringFrontend.

Migration 

Replace TYPO3CMSCoreCacheFrontendStringFrontend occurrences in cache configurations with TYPO3CMSCoreCacheFrontendVariableFrontend.