Puppeteer E2E test: Set timeout to 15 minutes

[LeviPesin]

Related issue: #25500 (comment)

Description

The default is 6 hours.

[gkjohnson]

I've cancelled the runs in #25500. We'll see if the others get stuck, too.

[LeviPesin]

Seems like https://github.com/mrdoob/three.js/actions/runs/4171044015 also got stuck.

[LeviPesin]

Maybe we should just cancel all stale runs in https://github.com/mrdoob/three.js/actions/workflows/ci.yml and https://github.com/mrdoob/three.js/actions/workflows/codeql-code-scanning.yml and then re-trigger them one by one... @mrdoob @gkjohnson

[LeviPesin]

I'm afraid something broke in the browser download loop (e.g. OmahaProxy and/or Chromium snaphosts storage is inaccessible, or it returns impossible data)... I've started a test run in my fork to debug it: https://github.com/LeviPesin/three.js-1/actions/runs/4172070897
Yes, it seems like the number there is going into negatives...