[TASK] Use EXTBASEPLUGIN in tests

Use the new v12 EXTBASEPLUGIN in TS setup
to streamline frontend functional tests a bit.

Resolves: #101773
Related: #100293
Releases: main, 12.4
Change-Id: I84e3cc93f617e3d8feeb76e6acf2c02bc4070a6d
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/80716


Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>

typo3/sysext/core/Tests/Functional/Fixtures/Extensions/test_irre_foreignfield/Configuration/TypoScript/ExtbaseJsonRenderer.typoscript

@@ -3,9 +3,8 @@
 page {
 	20 = COA
 	20 {
-		10 = USER
+		10 = EXTBASEPLUGIN
 		10 {
-			userFunc = TYPO3\CMS\Extbase\Core\Bootstrap->run
 			extensionName = TestIrreForeignfield
 			pluginName = Test
 		}

typo3/sysext/extbase/Tests/Functional/Persistence/Fixtures/Frontend/ContentJsonRenderer.typoscript

@@ -18,9 +18,8 @@ page = PAGE
 page {
 	10 = COA
 	10 {
-		10 = USER
+		10 = EXTBASEPLUGIN
 		10 {
-			userFunc = TYPO3\CMS\Extbase\Core\Bootstrap->run
 			extensionName = BlogExample
 			pluginName = Content
 		}

typo3/sysext/extbase/Tests/Functional/Persistence/Fixtures/Frontend/JsonRenderer.typoscript

@@ -18,9 +18,8 @@ page = PAGE
 page {
 	10 = COA
 	10 {
-		10 = USER
+		10 = EXTBASEPLUGIN
 		10 {
-			userFunc = TYPO3\CMS\Extbase\Core\Bootstrap->run
 			extensionName = BlogExample
 			pluginName = Blogs
 		}

typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/fluid_test/Configuration/TypoScript/ExtbaseController.typoscript

-page.10 = USER
+page.10 = EXTBASEPLUGIN
 page.10 {
-    userFunc = TYPO3\CMS\Extbase\Core\Bootstrap->run
     extensionName = FluidTest
     pluginName = Pi
     view < lib.viewConfig

typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/fluid_test/Configuration/TypoScript/ExtbasePlugin.typoscript

-page.10 = USER
+page.10 = EXTBASEPLUGIN
 page.10 {
-    userFunc = TYPO3\CMS\Extbase\Core\Bootstrap->run
     extensionName = FluidTest
     pluginName = Pi
 }

typo3/sysext/fluid/Tests/Functional/Fixtures/Extensions/fluid_test/Configuration/TypoScript/ExtbaseTwoPlugins.typoscript

-page.10 = USER
+page.10 = EXTBASEPLUGIN
 page.10 {
-    userFunc = TYPO3\CMS\Extbase\Core\Bootstrap->run
     extensionName = FluidTest
     pluginName = Pi
     view < lib.viewConfig