Chore: use jest without grunt (#28558)

* Chore: use jest without grunt

* Run no-focus-convey-tests and no-only-tests as well

* Update lib.star test-backend script with no-focus test to run first

* Lets see a failing test

* Revert "Lets see a failing test"

This reverts commit cb6c6ed67d.

* Update no-focus-convey test to a script

* Update scripts/lib.star

Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>

* Update drone.yml

Co-authored-by: Arve Knudsen <arve.knudsen@gmail.com>

scripts/grunt/options/exec.js

@@ -11,7 +11,6 @@ module.exports = function(config, grunt) {
     typecheckRoot: {
       command: 'yarn typecheck',
     },
-    jest: 'yarn jest-ci',
     webpack: 'node ./node_modules/webpack/bin/webpack.js --config scripts/webpack/webpack.prod.js',
   };
 };

scripts/lib.star

@@ -441,7 +441,9 @@ def test_backend_step():
             'lint-backend',
         ],
         'commands': [
-            # First execute non-integration tests in parallel, since it should be safe
+            # First make sure that there are no tests with FocusConvey
+            '[ $(grep FocusConvey -R pkg | wc -l) -eq "0" ] || exit 1',
+            # Then execute non-integration tests in parallel, since it should be safe
             './bin/grabpl test-backend',
             # Then execute integration tests in serial
             './bin/grabpl integration-tests',