SERVER-73541 Use dynamic import when loading parallel tester tests

.eslintrc.yml

@@ -1,9 +1,9 @@
 env:
-  es2020: true
+  es2022: true
   mongo: true
 
 parserOptions:
-  ecmaVersion: 2020
+  ecmaVersion: 2022
   sourceType: "module"
 
 rules:

jstests/libs/parallelTester.js

@@ -124,8 +124,8 @@ if (typeof _threadInject != "undefined") {
         this.params.push(args);
     };
 
-    ParallelTester.prototype.run = function(msg) {
-        assert.parallelTests(this.params, msg);
+    ParallelTester.prototype.run = async function(msg) {
+        await assert.parallelTests(this.params, msg);
     };
 
     // creates lists of tests from jstests dir in a format suitable for use by
@@ -359,22 +359,28 @@ if (typeof _threadInject != "undefined") {
         return params;
     };
 
+    async function measureAsync(fn) {
+        const start = new Date();
+        await fn.apply(null, Array.from(arguments).slice(2));
+        return (new Date()).getTime() - start.getTime();
+    }
+
     // runs a set of test files
     // first argument is an identifier for this tester, remaining arguments are file names
-    ParallelTester.fileTester = function() {
+    ParallelTester.fileTester = async function() {
         var args = Array.from(arguments);
         var suite = args.shift();
-        args.forEach(function(x) {
+        for (const x of args) {
             print("         S" + suite + " Test : " + x + " ...");
-            var time = Date.timeFunc(function() {
+            const time = await measureAsync(async function() {
                 // Create a new connection to the db for each file. If tests share the same
                 // connection it can create difficult to debug issues.
                 db = new Mongo(db.getMongo().host).getDB(db.getName());
                 gc();
-                load(x);
-            }, 1);
+                await import(x);
+            });
             print("         S" + suite + " Test : " + x + " " + time + "ms");
-        });
+        }
     };
 
     // params: array of arrays, each element of which consists of a function followed

jstests/parallel/basic.js

@@ -6,12 +6,12 @@ Random.setRandomSeed();
 
 var params = ParallelTester.createJstestsLists(4);
 var t = new ParallelTester();
-for (i in params) {
+for (let i in params) {
     t.add(ParallelTester.fileTester, params[i]);
 }
 
 try {
-    t.run("one or more tests failed");
+    await t.run("one or more tests failed");
 } finally {
     print(
         "If the failure here is due to a test unexpected being run, " +

jstests/parallel/basicPlus.js

@@ -8,7 +8,7 @@ Random.setRandomSeed();
 
 var params = ParallelTester.createJstestsLists(4);
 var t = new ParallelTester();
-for (i in params) {
+for (let i in params) {
     t.add(ParallelTester.fileTester, params[i]);
 }
 
@@ -28,7 +28,7 @@ for (var i = 4; i < 8; ++i) {
     t.add(EventGenerator.dispatch, g.getEvents());
 }
 try {
-    t.run("one or more tests failed");
+    await t.run("one or more tests failed");
 } finally {
     print(
         "If the failure here is due to a test unexpected being run, " +