fix(zone.js): fix `zone-patch-rxjs` bundle to refer to `rxjs` (rather than include) it. (#35983)

Close #35878.

Before zone.js 0.10, the rollup config would refer to `rxjs` when bundling `zone-patch-rxjs.js`
From zone.js 0.10, we started to use bazel to build `zone-patch-rxjs.js` and the configuration was wrongly defined to include a copy of `rxjs` in the `zone-patch-rxjs.js`.

PR Close #35983

packages/zone.js/rollup-es5.config.js

@@ -27,6 +27,23 @@ module.exports = {
     }),
     commonjs(),
   ],
-  external: ['electron'],
+  external: id => {
-  output: {globals: {electron: 'electron'}, banner},
+    if (/build-esm/.test(id)) {
+      return false;
+    }
+    return /rxjs/.test(id) || /electron/.test(id);
+  },
+  output: {
+    globals: {
+      electron: 'electron',
+      'rxjs/Observable': 'Rx',
+      'rxjs/Subscriber': 'Rx',
+      'rxjs/Subscription': 'Rx',
+      'rxjs/Scheduler': 'Rx.Scheduler',
+      'rxjs/scheduler/asap': 'Rx.Scheduler',
+      'rxjs/scheduler/async': 'Rx.Scheduler',
+      'rxjs/symbol/rxSubscriber': 'Rx.Symbol'
+    },
+    banner
+  },
 }

packages/zone.js/test/npm_package/npm_package.spec.ts

@@ -53,6 +53,13 @@ describe('Zone.js npm_package', () => {
          () => { expect(shx.cat('zone_externs.js')).toContain('Externs for zone.js'); });
     });
 
+    describe('rxjs patch', () => {
+      it('should not contain rxjs source', () => {
+        expect(shx.cat('zone-patch-rxjs.js'))
+            .not.toContain('_enable_super_gross_mode_that_will_cause_bad_things');
+      });
+    });
+
     describe('es5', () => {
       it('zone.js(es5) should not contain es6 spread code',
          () => { expect(shx.cat('zone.js')).not.toContain('let value of values'); });