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, 55 insertions, 0 deletions

diff --git a/cli/dts/lib.es2017.typedarrays.d.ts b/cli/dts/lib.es2017.typedarrays.d.ts
new file mode 100644
index 000000000..ac6984100
--- /dev/null
+++ b/cli/dts/lib.es2017.typedarrays.d.ts
@@ -0,0 +1,55 @@
+/*! *****************************************************************************
+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 Int8ArrayConstructor {
+    new (): Int8Array;
+}
+
+interface Uint8ArrayConstructor {
+    new (): Uint8Array;
+}
+
+interface Uint8ClampedArrayConstructor {
+    new (): Uint8ClampedArray;
+}
+
+interface Int16ArrayConstructor {
+    new (): Int16Array;
+}
+
+interface Uint16ArrayConstructor {
+    new (): Uint16Array;
+}
+
+interface Int32ArrayConstructor {
+    new (): Int32Array;
+}
+
+interface Uint32ArrayConstructor {
+    new (): Uint32Array;
+}
+
+interface Float32ArrayConstructor {
+    new (): Float32Array;
+}
+
+interface Float64ArrayConstructor {
+    new (): Float64Array;
+}