[Backport] added config for catalog review in frontend

[torhoehn]

Original Pull Request

#18895

Description

Until now there wasn't a config field to hide product review elements from frontend. I orientated at the wishlist module, because for wishlist it was already possible.

Manual testing scenarios

1. Open Backend
2. Go to Stores -> Configuration -> Catalog -> Catalog -> Product Reviews
3. Set 'Enabled' to 'No'
4. Newsletter will be hidden from catalog product view, customer account, customer account sidebar, ...

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[magento-engcom-team]

Hi @torhoehn. Thank you for your contribution
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[rogyar]

Hi @torhoehn. Thank you for your collaboration. Please, consider fixing failing unit tests.

[torhoehn]

@rogyar So for PHP 7.0 the return type should be removed?

[rogyar]

Yes, void return type is supported since PHP 7.1

[torhoehn]

@rogyar Looks good for me now.

[magento-engcom-team]

Hi @rogyar, thank you for the review.
ENGCOM-4131 has been created to process this Pull Request

[ghost]

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