Fix #305740: avoid sync subprocess wait in TS node path resolution

[rupeshkumar-555]

Problem

Issue #305740 reports host unresponsiveness when a subprocess wait blocks an event-loop owned path.

In TypeScript extension configuration, resolving the user-configured node path used a synchronous subprocess call:

• execFileSync('node', ...)

Even with a timeout, this can still block the extension host event loop during stalls and degrade responsiveness.

Fix

Replaced synchronous subprocess probing with direct PATH-based executable resolution:

• Added resolveNodeExecutableFromPath helper
• Removed execFileSync usage from node path detection
• Retained existing warning behavior when no node executable can be found

This keeps node path resolution fully non-blocking from the event-loop perspective.

Tests

• Added unit tests for PATH resolution behavior on win32 and non-win32
• Ran workspace compile successfully (0 errors)
• Ran focused node tests successfully

Fixes #305740

[Copilot]

Pull request overview

This PR addresses host responsiveness issues in the TypeScript extension by removing synchronous subprocess probing (execFileSync) from Node path detection and replacing it with PATH-based executable resolution.

Changes:

• Added resolveNodeExecutableFromPath to resolve node via PATH/PATHEXT instead of running a subprocess.
• Updated findNodePath to use the new resolver and keep the existing warning behavior when Node cannot be detected.
• Added unit tests covering PATH resolution on win32 and non-win32.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
extensions/typescript-language-features/src/configuration/configuration.electron.ts	Replaces sync subprocess detection with PATH-based resolution helper used by Node path detection.
extensions/typescript-language-features/src/test/unit/configuration.electron.test.ts	Adds unit coverage for the new PATH-based Node resolution behavior.

[rupeshkumar-555]

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