feat(plugin-lighthouse): add logLevel to lighthouse runner flags

[BioPhoton]

This PR is part of #695

It includes:

• set and forward logLevel in plugin-lighthouse runner
• set lighthouse CLI flag quiet to true by default (hide logs by default)
• adopt and rename setLoglevel function
• extend unit-tests
• use new implementation to display logs in the CI

closes #710

[github-actions]

Code PushUp

🥳 Code PushUp report has improved – compared target commit 773012f with source commit 0a8ed63.

🏷️ Categories

🏷️ Category	⭐ Current score	⭐ Previous score	🔄 Score change
Performance	🟢 91	🟡 88
Code coverage	🟡 89	🟡 89
Accessibility	🟢 98	🟢 98	–
Best Practices	🟢 100	🟢 100	–
SEO	🟡 85	🟡 85	–
Bug prevention	🟢 100	🟢 100	–
Code style	🟢 99	🟢 99	–
Security	🟢 100	🟢 100	–
Updates	🟡 79	🟡 79	–
Custom checks	🟡 67	🟡 67	–

🗃️ Groups

👍 2 groups improved

🔌 Plugin	🗃️ Group	⭐ Current score	⭐ Previous score	🔄 Score change
Lighthouse	Performance	🟢 91	🟡 88
Code coverage	Code coverage metrics	🟡 89	🟡 89

18 other groups are unchanged.

🛡️ Audits

👍 7 audits improved, 11 audits changed without impacting score

🔌 Plugin	🛡️ Audit	📏 Current value	📏 Previous value	🔄 Value change
Lighthouse	Max Potential First Input Delay	🟩 70 ms	🟥 270 ms
Lighthouse	Minimizes main-thread work	🟨 2.5 s	🟥 3.1 s
Lighthouse	Total Blocking Time	🟩 10 ms	🟩 180 ms
Lighthouse	First Contentful Paint	🟩 1.1 s	🟩 1.3 s
Lighthouse	Cumulative Layout Shift	🟨 0.147	🟨 0.148
Code coverage	Branch coverage	🟨 83 %	🟨 83 %
Code coverage	Line coverage	🟩 91 %	🟩 91 %
Lighthouse	Time to Interactive	🟩 1.2 s	🟩 1.8 s
Lighthouse	Metrics	🟩 1187	🟩 1779
Lighthouse	Speed Index	🟩 1.1 s	🟩 1.4 s
Lighthouse	First Meaningful Paint	🟩 1.1 s	🟩 1.3 s
Lighthouse	JavaScript execution time	🟩 0.1 s	🟩 0.1 s
Lighthouse	Avoids enormous network payloads	🟩 Total size was 432 KiB	🟩 Total size was 432 KiB
Lighthouse	Largest Contentful Paint	🟨 2.6 s	🟨 2.6 s
Lighthouse	Initial server response time was short	🟩 Root document took 10 ms	🟩 Root document took 0 ms
Lighthouse	Network Round Trip Times	🟩 10 ms	🟩 0 ms
Lighthouse	Uses efficient cache policy on static assets	🟨 11 resources found	🟨 11 resources found
Lighthouse	Server Backend Latencies	🟩 10 ms	🟩 10 ms

491 other audits are unchanged.