chore(vscode): add test for non installation of deps'

[benfdking]

• refactors some of the setup code
• adds a test to make sure if you don't have LSP deps it asks you to add them

• merge first fix(vscode): improve the tcloud stability

[Copilot]

Pull Request Overview

Adds utilities for creating and populating Python virtual environments in the test suite, refactors existing tests to use these helpers, and introduces a new test to ensure users are prompted when LSP dependencies are missing.

• Extracted venv creation and package installation into createVirtualEnvironment and pipInstall.
• Updated tcloud.spec.ts to use the new helpers.
• Added no_lsp.spec.ts to verify the “Install” prompt appears when LSP extras aren’t installed.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
vscode/extension/tests/utils.ts	Added execAsync, createVirtualEnvironment, and pipInstall.
vscode/extension/tests/tcloud.spec.ts	Replaced inline venv and pip calls with the new helpers.
vscode/extension/tests/no_lsp.spec.ts	New test to check UI prompt for missing LSP dependencies.

Comments suppressed due to low confidence (3)

vscode/extension/tests/utils.ts:127

• Update the JSDoc for pipInstall to reflect that it accepts multiple packages: change the description to 'Install packages in the given virtual environment.' and update @param packagePath to @param packagePaths (string[]).

* @param packagePath The path to the package to install.

vscode/extension/tests/tcloud.spec.ts:25

• [nitpick] The variable name custom_materializations uses snake_case in a TypeScript codebase; consider renaming to customMaterializations for consistency with camelCase conventions.

const custom_materializations = path.join(

vscode/extension/tests/no_lsp.spec.ts:13

• The test title refers to signing in but the logic checks for missing LSP dependencies; consider renaming to something like 'missing LSP dependencies shows install prompt' to match the test behavior.

test('not signed in, shows sign in window', async ({}, testInfo) => {