fix(templates): Decouple the Camoufox Playwright pin

[ousamabenyounes]

Description

• Give Camoufox an explicit Playwright 1.60.0 compatibility pin instead of following the shared updater pin.
• Resolve the shared pin only from the standard Playwright image variants.
• Validate that Camoufox's exact pinned image tag is published without automatically bumping it.

Issues

• Closes: Playwright bump script ignores base image variants, breaking camoufox e2e #2175

Testing

• uv run pytest tests/unit/scripts/test_update_playwright_version.py
• ./run-ci.sh

Test verification (RED → GREEN)

Upstream master with the reproduction test and published 3.13-1.61.0 tag:

Bumped Playwright version: 1.60.0 -> 1.61.0
FAILED test_camoufox_keeps_compatible_playwright_pin
assert 'playwright==1.60.0' in rendered
1 failed

Patched branch:

tests/unit/scripts/test_update_playwright_version.py ......... [100%]
9 passed
run-ci: ALL JOBS PASSED

Checklist

• CI passed