Add migration tasks

The tasks are no-op in 2022.2 but will be implemented in 2022.3 and
above and executed on CI for every pull request.

build/com.mbeddr/build.gradle

@@ -171,3 +171,11 @@ task printRepositories {
         println "dependencyRepositories: $dependencyRepositories"
     }
 }
+
+tasks.register('migrate') {
+    // No-op in this version
+}
+
+tasks.register('remigrate') {
+    // No-op in this version
+}