Backport 2.2 - Introducing a dedicated cron.log file for logging cron…

[hostep]

… related info, this reduces output in the system.log file.

(cherry picked from commit a4f58c8)

Description

This is a backport of #18209 for Magento 2.2, see original PR for full description.

Fixed Issues (if relevant)

1. system.log rapidly increasing after Magento CE 2.2.5 update (cron logs) #17190: system.log rapidly increasing after Magento CE 2.2.5 update (cron logs)

Manual testing scenarios

See original PR

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 @ihor-sviziev, thank you for the review.
ENGCOM-3104 has been created to process this Pull Request

[magento-engcom-team]

Hi @hostep. Thank you for your contribution.
We will aim to release these changes as part of 2.2.8.
Please check the release notes for final confirmation.

Please, consider to port this solution to 2.3 release line.
You may use Porting tool to port commits automatically.