runtime(js): update constant imports to use node:fs module

[smorimoto]

Summary

This PR addresses the deprecation warning DEP0008 by replacing direct usage of the deprecated node:constants module with the recommended approach of accessing constants through their respective modules.

Changes

• Replaced require("node:constants") with require("node:fs").constants in runtime/js/fs_node.js
• Updated code to follow Node.js best practices for accessing module-specific constants

Related Documentation

• Node.js Deprecation Guide (DEP0008)
• Node.js File System Constants

PR Overview

This PR updates constant imports to address the deprecation warning [DEP0008] by replacing the deprecated require of "node:constants" with the recommended "node:fs".

• Replaced constant imports in the access and open methods with require("node:fs").constants
• Ensured code changes follow Node.js best practices for accessing module-specific constants

Reviewed Changes

File	Description
runtime/js/fs_node.js	Updated require statements in the access and open methods to use "node:fs".

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