fix(vscode): honor VS Code global telemetry setting

[Vamsi-klu]

Description

Honor VS Code's global telemetry preference in every SQLMesh process launched by the extension.

• Force SQLMESH__DISABLE_ANONYMIZED_ANALYTICS=true when VS Code telemetry is disabled, while preserving existing SQLMesh opt-outs when it is enabled.
• Restart the LSP when the effective telemetry preference changes, including changes during initial startup.
• Propagate the telemetry-aware environment to the tcloud authentication subprocesses.
• Add unit and packaged code-server coverage.

Fixes #5690

Test Plan

• pnpm exec vitest run --maxWorkers=1 --minWorkers=1 — 30 tests passed across 6 files
• pnpm run check-types — passed
• pnpm exec tsc --noEmit --project tsconfig.json — passed
• pnpm exec eslint tests/utils_code_server.ts tests/configuration.spec.ts — passed
• pnpm exec playwright test tests/configuration.spec.ts --reporter=line — 5 passed
• git diff --check — passed

Checklist

• I have run make style and fixed any issues
• I have added tests for my changes (if applicable)
• All existing tests pass (make fast-test)
• My commits are signed off (git commit -s) per the DCO

[Vamsi-klu]

@cmgoffena13 @tripleaceme — could you review this? It touches LSP startup, configuration listeners, and packaged configuration E2E coverage related to your recent work in these areas.