[test] Speed up the envinfo test

[michaldudak]

Speeds up the envinfo package test that often times out:

• instead of installing packages during the test, we rely on the packages being installed for the whole workspace
• instead of building the envinfo package and calling npx, the script is tested by executing it directly with node. This slightly increases the potential for errors, but given that the package is hardly ever updated, it's a risk we can accept.

[mui-bot]

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[oliviertassinari]

Speeds up the envinfo package test that often times out:

To understand the pain, I guess it's more to improve the CI flakiness KPI than reduce time spent?

https://app.circleci.com/pipelines/github/mui/material-ui/119808/workflows/29cf5751-7417-43ec-bb9a-e9a072fd4836/jobs/644209

[michaldudak]

Both, actually. A simpler way to improve flakiness would be to increase the timeout, but given the low risk associated with this test, I ended up reimplemienting it.