Issue #3278246 by lauriii, alexpott, nod_, justafish: Deprecate...

Issue #3278246 by lauriii, alexpott, nod_, justafish: Deprecate core/scripts/js/babel-es6-build.js for removal from 10.0.x

(cherry picked from commit 8620063a)

core/scripts/js/babel-es6-build.js

@@ -22,6 +22,8 @@ const changeOrAdded = require('./changeOrAdded');
 const check = require('./check');
 const log = require('./log');
 
+console.warn('⚠️  yarn `build:js` command is deprecated in drupal:9.4.0 and will be removed from drupal:10.0.0. This command is no longer needed in Drupal 10.0.0 once https://www.drupal.org/project/drupal/issues/3278415 is committed.️');
+
 // Match only on .es6.js files.
 const fileMatch = './**/*.es6.js';
 // Ignore everything in node_modules

core/scripts/js/babel-es6-watch.js

@@ -16,6 +16,8 @@ const chokidar = require('chokidar');
 const changeOrAdded = require('./changeOrAdded');
 const log = require('./log');
 
+console.warn('⚠️  yarn `watch:js` command is deprecated in drupal:9.4.0 and will be removed from drupal:10.0.0. This command is no longer needed in Drupal 10.0.0 once https://www.drupal.org/project/drupal/issues/3278415 is committed.️');
+
 // Match only on .es6.js files.
 const fileMatch = './**/*.es6.js';
 // Ignore everything in node_modules