BREAKING: DENO_FUTURE=1 by default, or welcome to Deno 2.0 (#25213)

This commit effectively turns Deno into Deno 2.0.

This is done by forcing `DENO_FUTURE=1` env var, that was available in
the past few months to try Deno 2 changes.

This commit contains several breaking changes scheduled for Deno 2:
- all deprecated JavaScript APIs are not available any more, mostly
`Deno.*` APIs
- `window` global is removed
- FFI, WebGPU and FS APIs are now stable and don't require
`--unstable-*` flags
- import assertions are no longer supported
- "bring your own node modules" is enabled by default

This is the first commit in a series that are scheduled before the Deno
2 release.

Follow up work is tracked in
https://github.com/denoland/deno/issues/25241.

---------

Co-authored-by: Asher Gomez <ashersaupingomez@gmail.com>
Co-authored-by: Nayeem Rahman <nayeemrmn99@gmail.com>
Co-authored-by: Nathan Whitaker <nathan@deno.com>

cli/lsp/language_server.rs

@@ -3611,11 +3611,6 @@ impl Inner {
             .as_ref()
             .map(|url| url.to_string())
         }),
-        node_modules_dir: Some(
-          config_data
-            .and_then(|d| d.node_modules_dir.as_ref())
-            .is_some(),
-        ),
         // bit of a hack to force the lsp to cache the @types/node package
         type_check_mode: crate::args::TypeCheckMode::Local,
         ..Default::default()