chore: change ls node bundle path logic

Description

This MR changes LS node bundle path resolution logic to support gitlab-org/editor-extensions/gitlab-lsp#1461 (closed)

Here's the related MR in the LS server: gitlab-org/editor-extensions/gitlab-lsp!2242 (merged)

Related Issues

Resolves #2117 (closed)

How has this been tested?

1. run the vscode-extension and check that the webviews and code suggestions are working as expected.
2. checkout gitlab-org/editor-extensions/gitlab-lsp!2242 (merged)
3. run npm run watch -- --editor=vscode in gitlab lsp
4. run the vscode-extension and check the webviews and code suggestions are working as expected.

• If src/browser or src/common has been modified, please consider interoperability with the Web IDE. See Running the Extension in WebIDE.
• Consider an end-to-end test for significant new features that aren't covered by integration tests.

Screenshots (if appropriate)

What CHANGELOG entry will this MR create?

• fix: Bug fix fixes - a user-facing issue in production - included in changelog
• feature: New feature - a user-facing change which adds functionality - included in changelog
• BREAKING CHANGE: (fix or feature that would cause existing functionality to change) - should bump major version, mentioned in the changelog
• None - other non-user-facing changes