`npm run test:ghpages:beta` doesn't work for hoisting

[maribethb]

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Component

blockly-samples infrastructure

Description

We recently changed how we structure the dependencies in samples to use hoisting so we eliminate the "two blockly problem"

However running npm run test:ghpages:beta will try to install blockly@beta inside every plugin which is now wrong. That's fine for examples where we're not using hoisting. For samples it needs to install blockly@beta at the root of samples. but there might be problems if the plugins say they require a version of blockly that isn't compatible with the beta.

Don't run this command until this is fixed

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