This removes the EventListener, EventInit and CustomEventInit constructors from the userland globals. The type exports stay.

I removed the internal classes as well. EventListener's implementation seemed to be doing some bookkeeping on handled events but that's not being used anywhere so I assume it's old debug stuff. The other two are completely redundant.

This ensures the deno executable is properly created before running the integration tests.

Also allows deno_cli to be used as a lib. Docs are now properly generated: https://docs.rs/deno_cli/0.18.4/deno_cli/

Towards #2933
Prep for #2955

and remove DENO_NINJA_PATH from manual

Change submodule names to match the name of the corresponding github
repository, which is easier to remember than using the full path where
the submodule is (or used to be) checked out.

- Fixes cargo publish on deno_typescript, deno_cli_snapshots, and
  deno_cli.
- Combines cli_snapshots and js into one directory.
- Extracts TS version at compile time rather than runtime
- Bumps version awkwardly - it was necessary to test end-to-end
  publishing. Sorry.
- Adds git submodule deno_typescript/typescript

* Remove reference to removed dir 'third_party/rust_crates'.
* Remove reference to unused environment variable 'DENO_NINJA_PATH'.
* Remove helper functions 'root()' and 'tp()'.
* Move definition of 'third_party_path' to build.py.
* Move definition of 'gn_exe()' to setup.py.
* Move 'download_sccache()' and 'download_hyperfine()' from prebuilt.py
  to third_party.py, and delete prebuilt.py.
* Add helper function 'get_platform_dir_name()' to locate the
  platform-specific 'v8/buildtools/<platform>' and
  'prebuilt/<platform>' directories.
* Add helper function 'get_prebuilt_tool_path()' that returns the full
  path to a platform-specific executable in //prebuilt.
* Cosmetic improvements.

Users shouldn't have to do this manually, so we want to configure CI
such that it fails if our build scripts don't set it up automatically.

depot_tools is removing pylint from its distribution so we must maintain
our own copy.