Support TypeScript 4.1 via typescript-estree (#9636)

* Update typescript and typescript-estree

* Add AST transformation for TSTemplateLiteralType

* Update tests for template-literal-types

* Fix transformChainExpression

* Update tests for key-remapping-in-mapped-types

* Implement recoverInvalidDecorators

* Update changelog

* Avoid typecheck error

* Add os.platform() shim

* Update config.js

* Update config.js

* Shim os.cpus

* Update `process.versions.node`

* Attempt to fix build

* Update ts parserOptions

* Fix code style

* Remove `errorOnUnknownASTType`, fix code style

* Use `[] ||` instead of `[] //`

* Fix hack

* Add invalid tests

* checkMissingDecorators

* Update tests

* Fix tests

* Add comment

* Revert "Implement recoverInvalidDecorators"

This reverts commit 27e7b46ed41df36fb585791117c85e1b2dab932c.

* Add ref pr link

* Simplify logic

* Don't transform `TSTemplateLiteralType`

* Add `TSTemplateLiteralType` as simple type

* Fix tests

* Update comments

* Add comment

* Fix logic

* Minor tweak

* use multiple parsers

* Update @typescript-eslint/typescript-estree to v4.8.0

* Switch to `parseWithNodeMaps`

* Rename `esNode` -> `esTreeNode`

* Update @typescript-eslint/typescript-estree to 4.8.1-alpha.1

* Use @typescript-eslint/typescript-estree 4.8.1

Co-authored-by: fisker Cheung <lionkay@gmail.com>

scripts/build/shims/os.mjs

@@ -1,3 +1,5 @@
 export default {
   EOL: "\n",
+  platform: () => "browser",
+  cpus: () => [{ model: "Prettier" }],
 };