WIP: Support Playwright >= 1.58 (CfT download paths)

[benfdking]

Starting point for adding Playwright 1.58+ support to our fork. Not ready to merge — this PR exists to host iteration on the CfT (Chrome-for-Testing) browser layout work that blocks sqruff from bumping @playwright/test past 1.57.0.

Starting point

This branch is a direct copy of upstream draft mrmeku/rules_playwright#36 (MatrixFrog:download-paths, head e39e4ed). That PR is a single commit titled "Update download_paths.json to be compatible with newer versions of Playwright" — its author flagged it as "maybe not the ideal long-term fix" and noted it would break older Playwright versions. We're using it as scaffolding, not as a finished implementation.

Why we need this

Playwright 1.58+ made two breaking changes the fork has to absorb before sqruff can update past 1.57.0:

1. New OS-version-prefixed browser directory: runtime now looks for browsers at ${PLAYWRIGHT_BROWSERS_PATH}/<os>-<arch>/chromium_headless_shell-<rev>/... (e.g. ubuntu24.04-x64/chromium_headless_shell-1223/chrome-headless-shell-linux64/chrome-headless-shell).
2. Chromium revision bumped 1200 → 1223 and downloads moved from playwright.azureedge.net/builds/chromium/<rev>/... to Chrome-for-Testing URLs at https://cdn.playwright.dev/builds/cft/<browserVersion>/<platform>/chrome[-headless-shell]-<platform>.zip.

rules_playwright 0.5.3 (current BCR) still uses the old azureedge URLs and old layout, so even with playwright_version = "1.60.0" we end up with the 1.57-era binary in the wrong path.

What still needs doing on this branch

• Confirm download_paths.json is correct for Playwright 1.58 → 1.60 (regenerate from upstream microsoft/playwright's browsers.json if needed).
• Verify the URL template switches to CfT (cdn.playwright.dev/builds/cft/...) for chromium / chromium-headless-shell on 1.58+ while keeping the old template for <= 1.57 pins, so we don't break existing consumers.
• Verify the OS-prefixed extraction layout lands the binary where the Playwright runtime expects it (no extra symlinking required).
• Refresh repositories.bzl / extensions.bzl http_file repo names + sha256s for the new URLs.
• Validate end-to-end against quarylabs/sqruff via git_override pointed at this branch: bazel test //playground:playwright_test //editors/code:playwright_test on linux x64 (CI matrix) plus a darwin-arm64 smoke test.
• Once it works, propose the cleaned-up version upstream so we can eventually drop the override.

Refs

• Tracking ticket: BEN-334
• Upstream PR (source): Update download_paths.json to be compatible with newer versions of Playwright mrmeku/rules_playwright#36
• Upstream issue: Support Chrome for Testing (CfT) download URLs used by Playwright >= 1.57 mrmeku/rules_playwright#44
• Consumer: chore: bump @playwright/test from 1.57.0 to 1.60.0 sqruff#2569 (failing run https://github.com/quarylabs/sqruff/actions/runs/25985928585/job/76383107917)