test(plugin-lighthouse): add lighthouse CI flags to configs

[BioPhoton]

When using Chrome it helps to have a set of flags for more stable runs in a tooling environment like thee CI.
The chrome-launcher package provides a set of flags dedicated to tooling that they also documented very well.

This PR includes:

• docs
• uses tooling flags in both configs

closes #657

[nx-cloud]

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✅ Successfully ran 6 targets

• nx release --yes --dry-run
• nx affected:e2e --parallel=3
• nx affected -t integration-test --parallel=3 --coverage.enabled
• nx affected -t unit-test --parallel=3 --coverage.enabled
• nx affected:lint --parallel=3
• nx affected:build --parallel=3

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[github-actions]

Code PushUp

🤨 Code PushUp report has both improvements and regressions – compared target commit 38a7b20 with source commit 6f92d90.

🏷️ Categories

🏷️ Category	⭐ Current score	⭐ Previous score	🔄 Score change
Performance	🟡 68	🟡 79
Updates	🟡 70	🟡 70
Code coverage	🟡 70	🟡 70
Accessibility	🟢 100	🟢 100	–
Best Practices	🟢 100	🟢 100	–
SEO	🟡 86	🟡 86	–
PWA	🟡 63	🟡 63	–
Bug prevention	🟢 100	🟢 100	–
Code style	🟢 99	🟢 99	–
Security	🟡 80	🟡 80	–
Custom checks	🟡 67	🟡 67	–

🗃️ Groups

👍 2 groups improved, 👎 1 group regressed

🔌 Plugin	🗃️ Group	⭐ Current score	⭐ Previous score	🔄 Score change
Lighthouse	Performance	🟡 68	🟡 79
JS Packages	NPM outdated dependencies	🟡 70	🟡 70
Code coverage	Code coverage metrics	🟡 70	🟡 70

18 other groups are unchanged.

🛡️ Audits

👍 3 audits improved, 👎 9 audits regressed, 7 audits changed without impacting score

🔌 Plugin	🛡️ Audit	📏 Current value	📏 Previous value	🔄 Value change
Lighthouse	JavaScript execution time	🟥 1.3 s	🟩 1.1 s
Lighthouse	Total Blocking Time	🟥 1,240 ms	🟥 620 ms
Lighthouse	Max Potential First Input Delay	🟥 1,070 ms	🟥 430 ms
Lighthouse	First Contentful Paint	🟩 1.7 s	🟩 1.3 s
Lighthouse	Largest Contentful Paint	🟨 3.1 s	🟨 3.0 s
Lighthouse	Time to Interactive	🟨 3.9 s	🟩 3.4 s
Lighthouse	Speed Index	🟩 2.5 s	🟩 1.7 s
JS Packages	Outdated NPM dev dependencies.	🟨 49 outdated package versions (24 major, 20 minor, 4 patch, 1 prerelease)	🟨 48 outdated package versions (24 major, 20 minor, 3 patch, 1 prerelease)
Lighthouse	First Meaningful Paint	🟩 1.7 s	🟩 1.4 s
Code coverage	Function coverage	🟨 64 %	🟨 64 %
Code coverage	Branch coverage	🟨 82 %	🟨 82 %
Code coverage	Line coverage	🟨 67 %	🟨 67 %
Lighthouse	Minimizes main-thread work	🟥 4.3 s	🟥 3.2 s
Lighthouse	Metrics	🟩 3866	🟩 3398
Lighthouse	Properly size images	🟥 Potential savings of 327 KiB	🟥 Potential savings of 327 KiB
Lighthouse	Server Backend Latencies	🟩 30 ms	🟩 20 ms
Lighthouse	Initial server response time was short	🟩 Root document took 0 ms	🟩 Root document took 10 ms
Lighthouse	Network Round Trip Times	🟩 10 ms	🟩 10 ms
Lighthouse	Avoids enormous network payloads	🟩 Total size was 467 KiB	🟩 Total size was 467 KiB

504 other audits are unchanged.