Prevent creation of empty source files (#23634)

* Add test to prevent `crowdin upload` errors

* Remove empty file causing `crowdin upload` error

Closes https://github.com/github/crowdin-support/issues/117

Author: mjacobus

data/reusables/actions/ae-beta.md

@@ -0,0 +1,13 @@
+import {execSync} from 'child_process'
+
+describe('source directories', () => {
+  // crowdin upload sources command fails if there are empty source files
+  // please refer to crowdin-support #117 for more details
+  it('should not contain empty files', () => {
+    const command = "find content data -type f -empty"
+    const emptyFiles = execSync(command).toString().split("\n")
+    const disallowedEmptyFiles = emptyFiles.filter(file => file.match(/\.(yml|md)$/))
+
+    expect(disallowedEmptyFiles).toEqual([])
+  })
+})