ci: improve cache-hit workflow latency

[thejackshelton]

Summary

• restore and save the optimizer cache with the same packages/optimizer/ path
• make combined-optimizer always provide artifact-optimizer, whether from cache or a fresh native build
• let build-other-packages restore/upload package artifacts on cache hits
• start E2E jobs after build artifacts are ready instead of waiting for unit tests
• skip the npm release job on pull requests
• skip pkg.pr.new preview publishing while the pull request is a draft
• remove Playwright slowMo from GitHub CI while keeping it for local runs
• tighten completed-test cache keys for unit, main E2E, and docs E2E changes

Validation

• /private/tmp/actionlint-1.7.12/actionlint -color=false .github/workflows/ci.yml
• /Users/jacksm5pro/dev/open-source/qwik/node_modules/.bin/prettier --no-config --single-quote --trailing-comma es5 --print-width 100 --tab-width 2 --check .github/workflows/ci.yml e2e/qwik-e2e/playwright.config.ts
• git diff --check
• NPM_CONFIG_USERCONFIG=/dev/null pnpm --config.platform=linux --config.arch=x64 dedupe --check
• GitHub Actions run 26608984801: full Qwik CI passed; Release and Release pkg.pr.new both skipped on the draft PR

Security notes

• cache restores use exact content-derived keys without restore-keys
• optimizer cache restores require fail-on-cache-miss
• no new secrets or elevated permissions were added
• cached optimizer output is re-uploaded as a same-run artifact only after the cache/build prerequisite checks pass

[changeset-bot]

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Latest commit: afd025a

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[pkg-pr-new]

Open in StackBlitz

@qwik.dev/core

npm i https://pkg.pr.new/QwikDev/qwik/@qwik.dev/core@8682

@qwik.dev/router

npm i https://pkg.pr.new/QwikDev/qwik/@qwik.dev/router@8682

eslint-plugin-qwik

npm i https://pkg.pr.new/QwikDev/qwik/eslint-plugin-qwik@8682

create-qwik

npm i https://pkg.pr.new/QwikDev/qwik/create-qwik@8682

@qwik.dev/optimizer

npm i https://pkg.pr.new/QwikDev/qwik/@qwik.dev/optimizer@8682

commit: ffca016

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[maiieul]

I'd like to keep the pkg.pr.new even for PRs in draft 🙏