refactor(core): include_js_files! 'dir' option doesn't change specifiers (#18019)

This commit changes "include_js_files!" macro from "deno_core"
in a way that "dir" option doesn't cause specifiers to be rewritten 
to include it.

Example:
```
include_js_files! {
  dir "js",
  "hello.js",
}
```

The above definition required embedders to use:
`import ... from "internal:<ext_name>/js/hello.js"`. 
But with this change, the "js" directory in which the files are stored
is an implementation detail, which for embedders results in: 
`import ... from "internal:<ext_name>/hello.js"`.

The directory the files are stored in, is an implementation detail and 
in some cases might result in a significant size difference for the 
snapshot. As an example, in "deno_node" extension, we store the 
source code in "polyfills" directory; which resulted in each specifier 
to look like "internal:deno_node/polyfills/<module_name>", but with 
this change it's "internal:deno_node/<module_name>". 

Given that "deno_node" has over 100 files, many of them having 
several import specifiers to the same extension, this change removes
10 characters from each import specifier.

2 files changed, 10 insertions, 10 deletions

diff --git a/ext/node/polyfills/_process/process.ts b/ext/node/polyfills/_process/process.ts
index 24a4ae1a2..3bcf6dcf9 100644
--- a/ext/node/polyfills/_process/process.ts
+++ b/ext/node/polyfills/_process/process.ts
@@ -4,10 +4,10 @@
 // The following are all the process APIs that don't depend on the stream module
 // They have to be split this way to prevent a circular dependency
 
-import { build } from "internal:runtime/js/01_build.js";
-import { nextTick as _nextTick } from "internal:deno_node/polyfills/_next_tick.ts";
-import { _exiting } from "internal:deno_node/polyfills/_process/exiting.ts";
-import * as fs from "internal:runtime/js/30_fs.js";
+import { build } from "internal:runtime/01_build.js";
+import { nextTick as _nextTick } from "internal:deno_node/_next_tick.ts";
+import { _exiting } from "internal:deno_node/_process/exiting.ts";
+import * as fs from "internal:runtime/30_fs.js";
 
 /** Returns the operating system CPU architecture for which the Deno binary was compiled */
 export function arch(): string {
diff --git a/ext/node/polyfills/_process/streams.mjs b/ext/node/polyfills/_process/streams.mjs
index b27f75e2d..da6895dbb 100644
--- a/ext/node/polyfills/_process/streams.mjs
+++ b/ext/node/polyfills/_process/streams.mjs
@@ -1,17 +1,17 @@
 // Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
 // Copyright Joyent, Inc. and Node.js contributors. All rights reserved. MIT license.
 
-import { Buffer } from "internal:deno_node/polyfills/buffer.ts";
+import { Buffer } from "internal:deno_node/buffer.ts";
 import {
   clearLine,
   clearScreenDown,
   cursorTo,
   moveCursor,
-} from "internal:deno_node/polyfills/internal/readline/callbacks.mjs";
-import { Duplex, Readable, Writable } from "internal:deno_node/polyfills/stream.ts";
-import { isWindows } from "internal:deno_node/polyfills/_util/os.ts";
-import { fs as fsConstants } from "internal:deno_node/polyfills/internal_binding/constants.ts";
-import * as files from "internal:runtime/js/40_files.js";
+} from "internal:deno_node/internal/readline/callbacks.mjs";
+import { Duplex, Readable, Writable } from "internal:deno_node/stream.ts";
+import { isWindows } from "internal:deno_node/_util/os.ts";
+import { fs as fsConstants } from "internal:deno_node/internal_binding/constants.ts";
+import * as files from "internal:runtime/40_files.js";
 
 // https://github.com/nodejs/node/blob/00738314828074243c9a52a228ab4c68b04259ef/lib/internal/bootstrap/switches/is_main_thread.js#L41
 export function createWritableStdioStream(writer, name) {