Reduce size of TypeScript Compiler snapshot (#6809)

This PR is intentionally ugly. It duplicates all of the code in cli/js2/ into
cli/tsc/  ... because it's very important that we all understand that this code
is unnecessarily duplicated in our binary. I hope this ugliness provides the
motivation to clean it up.

The typescript git submodule is removed, because it's a very large repo and
contains all sorts of stuff we don't need. Instead the necessary files are
copied directly into the deno repo. Hence +200k lines.

COMPILER_SNAPSHOT.bin size
```
master         3448139
this branch    3320972
```

Fixes #6812

1 files changed, 50 insertions, 0 deletions

diff --git a/cli/dts/lib.es2020.promise.d.ts b/cli/dts/lib.es2020.promise.d.ts
new file mode 100644
index 000000000..a3b2c0aa8
--- /dev/null
+++ b/cli/dts/lib.es2020.promise.d.ts
@@ -0,0 +1,50 @@
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+interface PromiseFulfilledResult<T> {
+    status: "fulfilled";
+    value: T;
+}
+
+interface PromiseRejectedResult {
+    status: "rejected";
+    reason: any;
+}
+
+type PromiseSettledResult<T> = PromiseFulfilledResult<T> | PromiseRejectedResult;
+
+interface PromiseConstructor {
+    /**
+     * Creates a Promise that is resolved with an array of results when all
+     * of the provided Promises resolve or reject.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    allSettled<T extends readonly unknown[] | readonly [unknown]>(values: T):
+        Promise<{ -readonly [P in keyof T]: PromiseSettledResult<T[P] extends PromiseLike<infer U> ? U : T[P]> }>;
+
+    /**
+     * Creates a Promise that is resolved with an array of results when all
+     * of the provided Promises resolve or reject.
+     * @param values An array of Promises.
+     * @returns A new Promise.
+     */
+    allSettled<T>(values: Iterable<T>): Promise<PromiseSettledResult<T extends PromiseLike<infer U> ? U : T>[]>;
+}