build: update dependency @vscode/test-electron to v3 (main)

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@vscode/test-electron	~2.5.2 → ~3.0.0

---

• If you want to rebase/retry this PR, check this box

[renovate]

⚠️ Artifact update problem

Renovate failed to update artifacts related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: undefined

Post-upgrade command 'git restore .npmrc' has not been added to the allowed list in allowedCommands

File name: undefined

Post-upgrade command 'pnpm install --frozen-lockfile' has not been added to the allowed list in allowedCommands

File name: undefined

Post-upgrade command 'pnpm ng-dev misc sync-module-bazel' has not been added to the allowed list in allowedCommands

File name: undefined

Post-upgrade command 'pnpm bazel run //.github/actions/deploy-docs-site:main' has not been added to the allowed list in allowedCommands

File name: undefined

Post-upgrade command 'pnpm bazel run //packages/common:base_currencies_file' has not been added to the allowed list in allowedCommands

File name: undefined

Post-upgrade command 'pnpm bazel run //packages/common/locales:closure_locale_file' has not been added to the allowed list in allowedCommands

File name: undefined

Post-upgrade command 'pnpm bazel run //packages/core:base_locale_file' has not been added to the allowed list in allowedCommands