test: improve stability of strategy tests

The strategy tests are extremely time-sensitive with regards to the RxJS
job logic executing, and the tests currently rely on `setImmediate` to
flush/trigger job execution. This seems to be rather unstable via Remote
execution, and sensitive to changes with the execution (e.g. injecting
source map support or not), so we are stabilizing the tests further by
having better time delays for job execution, and by using `setTimeout`
for flushing. This seems very sufficient.

packages/angular_devkit/architect/src/jobs/strategy_spec.ts

@@ -6,14 +6,14 @@
  * found in the LICENSE file at https://angular.dev/license
  */
 
-import { promisify } from 'util';
+import timers from 'node:timers/promises';
 import { JobState } from './api';
 import { createJobHandler } from './create-job-handler';
 import { SimpleJobRegistry } from './simple-registry';
 import { SimpleScheduler } from './simple-scheduler';
 import * as strategy from './strategy';
 
-const flush = promisify(setImmediate);
+const flush = () => timers.setTimeout(1);
 
 describe('strategy.serialize()', () => {
   let registry: SimpleJobRegistry;
@@ -37,7 +37,7 @@ describe('strategy.serialize()', () => {
             setTimeout(() => {
               finished++;
               resolve(input.reduce((a, c) => a + c, 0));
-            }, 10),
+            }, 100),
           );
           // eslint-disable-next-line @typescript-eslint/no-explicit-any
         }) as any,
@@ -94,7 +94,7 @@ describe('strategy.serialize()', () => {
             setTimeout(() => {
               finished++;
               resolve(input.reduce((a, c) => a + c, 0));
-            }, 10),
+            }, 100),
           );
           // eslint-disable-next-line @typescript-eslint/no-explicit-any
         }) as any,
@@ -114,7 +114,7 @@ describe('strategy.serialize()', () => {
             setTimeout(() => {
               finished++;
               resolve(input.reduce((a, c) => a + c, 100));
-            }, 10),
+            }, 100),
           );
           // eslint-disable-next-line @typescript-eslint/no-explicit-any
         }) as any,
@@ -179,7 +179,7 @@ describe('strategy.reuse()', () => {
             setTimeout(() => {
               finished++;
               resolve(input.reduce((a, c) => a + c, 0));
-            }, 10),
+            }, 100),
           );
           // eslint-disable-next-line @typescript-eslint/no-explicit-any
         }) as any,
@@ -254,7 +254,7 @@ describe('strategy.memoize()', () => {
             setTimeout(() => {
               finished++;
               resolve(input.reduce((a, c) => a + c, 0));
-            }, 10),
+            }, 100),
           );
           // eslint-disable-next-line @typescript-eslint/no-explicit-any
         }) as any,