Feature: #88276 - TypoScript Condition for page layout

See Issue #88276

Description

A new condition enables integrators to check for the defined backend layout of a page including the inheritance of the field Backend Layout (subpages of this page)

# Using backend_layout records
[tree.pagelayout == 2]
    page.1 = TEXT
    page.1.value = Layout 2
[END]

# Using TsConfig provider of Backend Layouts
[tree.pagelayout == "pagets__Home"]
    page.1 = TEXT
    page.1.value = Layout Home
[END]

This condition is enabled for the frontend and backend.

Impact

Change the TypoScript or TsConfig based on the backend layout of a page.