build: phaseout kotlin-android-extensions plugin

According to https://android-developers.googleblog.com/2022/02/discontinuing-kotlin-synthetics-for-views.html
this Gradle plugin is no longer required, and will actually prevent
using newer Kotlin versions to build Android applications. This is
also reflected in apache#1642,
so staying one step ahead, this plugin has been effectively removed.

References https://outsystemsrd.atlassian.net/browse/RNMT-6192

templates/project/app/build.gradle

@@ -21,11 +21,6 @@ apply plugin: 'com.android.application'
 
 if (cordovaConfig.IS_GRADLE_PLUGIN_KOTLIN_ENABLED) {
     apply plugin: 'kotlin-android'
-
-    if(!cdvHelpers.isVersionGreaterThanEqual(cordovaConfig.KOTLIN_VERSION, '1.8.0')) {
-        println "Kotlin version < 1.8.0 detected. Applying kotlin-android-extensions plugin."
-        apply plugin: 'kotlin-android-extensions'
-    }
 }
 
 buildscript {