VS Code extension startup popups reduced; turbo.jsonc now supported

<!-- Release notes generated using configuration in .github/release.yml at v2.9.11-canary.4 -->

What's Changed

Changelog

• ci: Parallelize LSP release publishing by @anthonyshew in https://github.com/vercel/turborepo/pull/12758
• fix: Reduce VS Code extension startup popups by @anthonyshew in https://github.com/vercel/turborepo/pull/12759
• fix: Support turbo.jsonc in VS Code extension by @anthonyshew in https://github.com/vercel/turborepo/pull/12760
• fix: Remove VS Code task key gradient by @anthonyshew in https://github.com/vercel/turborepo/pull/12761
• release(turborepo): 2.9.11-canary.3 by @github-actions[bot] in https://github.com/vercel/turborepo/pull/12756

Full Changelog: https://github.com/vercel/turborepo/compare/v2.9.11-canary.3...v2.9.11-canary.4