[Tidy] Revert to original fixed version of chromedriver-autoinstaller

[antonymilne]

Description

We were using the fork chrome-autoinstaller-fix temporarily while some issues on chrome-autoinstaller were being fixed. The fixes have now been merged back into the main package so we can go back to using it.

Also spotted a problem with tests not clearing up after add_type. Spent a while trying to fix it, decided it's not super easy so not worth the time and effort, hence just put in some comments explaining what's happening.

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