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.

1 files changed, 6 insertions, 6 deletions

diff --git a/ext/node/polyfills/_fs/_fs_opendir.ts b/ext/node/polyfills/_fs/_fs_opendir.ts
index 5ee13f951..a14f12f15 100644
--- a/ext/node/polyfills/_fs/_fs_opendir.ts
+++ b/ext/node/polyfills/_fs/_fs_opendir.ts
@@ -1,17 +1,17 @@
 // Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
 
-import Dir from "internal:deno_node/polyfills/_fs/_fs_dir.ts";
-import { Buffer } from "internal:deno_node/polyfills/buffer.ts";
+import Dir from "internal:deno_node/_fs/_fs_dir.ts";
+import { Buffer } from "internal:deno_node/buffer.ts";
 import {
   getOptions,
   getValidatedPath,
-} from "internal:deno_node/polyfills/internal/fs/utils.mjs";
-import { denoErrorToNodeError } from "internal:deno_node/polyfills/internal/errors.ts";
+} from "internal:deno_node/internal/fs/utils.mjs";
+import { denoErrorToNodeError } from "internal:deno_node/internal/errors.ts";
 import {
   validateFunction,
   validateInteger,
-} from "internal:deno_node/polyfills/internal/validators.mjs";
-import { promisify } from "internal:deno_node/polyfills/internal/util.mjs";
+} from "internal:deno_node/internal/validators.mjs";
+import { promisify } from "internal:deno_node/internal/util.mjs";
 
 /** These options aren't funcitonally used right now, as `Dir` doesn't yet support them.
  * However, these values are still validated.