chore: make ci more robust, fix stack overflow and import problem

[maribethb]

The basics

• I validated my changes

The details

Resolves

Fixes (hopefully) intermittent CI failures

Proposed Changes

• fixes a stack overflow that occurred if a sound is missing (this happened because get parent's audio context always pointed to this so we just kept trying to call .play over and over again. instead we only try that if the parent audio context is not this)
• fixes a stray import from .blockly.js instead of the more specific file
• increases the webdriver timeout from 100 to 200 seconds because we've added more tests and maybe they're flaky because they're right on the cusp of timeout
• added some logging and made the mocha tests fail if blockly fails to load. this is common when you introduce an accidental circular dependency and previously the tests would hang without showing an error.
• added some try/catch/finally around closing the mocha process so that we hopefully get better errors than "did you forget to signal async completion?" from gulp
• adds a setup Chrome action to the CI to make sure chrome is downloaded correctly... this is heavily AI-assisted code

Reason for Changes

ci is killing me

Test Coverage

tested to make sure that regular console.errors dont cause the tests to fail, but introducing a circular dependency does.

Documentation

Additional Information

[lizschwab]

Looks good. I like all the extra logging!

[lizschwab]

👍