build: enable service-worker tests on saucelabs (#36129)

Enables the `service-worker` tests on Saucelabs and fixes some issues that were preventing them from running on IE. The issues were:
1. We were serving es2017 code during tests. I've set it to es5.
2. The check which was verifying whether the environment is supported ended up hitting a `require` call in the browser which caused it to fail on browsers that don't support the `URL` API.

PR Close #36129

packages/service-worker/test/BUILD.bazel

@@ -33,14 +33,6 @@ jasmine_node_test(
 
 karma_web_test_suite(
     name = "test_web",
-    tags = [
-        # FIXME: fix on saucelabs
-        # ERROR: 'There is no timestamp for @angular/service-worker/worker/src/db-cache.js!'
-        # ERROR: 'There is no timestamp for @angular/service-worker/worker/src/driver.js!'
-        # ERROR: 'There is no timestamp for @angular/service-worker/worker/src/sha1.js!'
-        "fixme-saucelabs-ivy",
-        "fixme-saucelabs-ve",
-    ],
     deps = [
         ":test_lib",
     ],

packages/service-worker/worker/BUILD.bazel

@@ -13,14 +13,12 @@ ts_library(
             "main.ts",
         ],
     ),
-    tsconfig = ":tsconfig.json",
     deps = ["@npm//@types/node"],
 )
 
 ts_library(
     name = "main",
     srcs = ["main.ts"],
-    tsconfig = ":tsconfig.json",
     deps = [":worker"],
 )
 

packages/service-worker/worker/testing/scope.ts

@@ -100,6 +100,12 @@ export class SwTestHarness implements ServiceWorkerGlobalScope, Adapter, Context
       return true;
     }
 
+    // If we're in a browser that doesn't support URL at this point, don't go any further
+    // since browser builds use requirejs which will fail on the `require` call below.
+    if (typeof window !== 'undefined' && window) {
+      return false;
+    }
+
     // In older Node.js versions, the `URL` global does not exist. We can use `url` instead.
     const url = (typeof require === 'function') && require('url');
     return url && (typeof url.parse === 'function') && (typeof url.resolve === 'function');

packages/service-worker/worker/tsconfig.json

@@ -1,27 +0,0 @@
-{
-  "compilerOptions": {
-    "baseUrl": ".",
-    "declaration": false,
-    "strict": true,
-    "module": "es2015",
-    "moduleResolution": "node",
-    "strictNullChecks": true,
-    "strictPropertyInitialization": true,
-    "outDir": "../../../dist/all/@angular/service-worker/worker-es2017",
-    "noImplicitAny": true,
-    "noFallthroughCasesInSwitch": true,
-    "rootDir": ".",
-    "inlineSourceMap": true,
-    "lib": ["es2015", "dom"],
-    "target": "es2017",
-    "typeRoots": [],
-    "types": []
-  },
-  "bazelOptions": {
-    "suppressTsconfigOverrideWarnings": true
-  },
-  "files": [
-    "main.ts",
-    "src/service-worker.d.ts"
-  ]
-}