Revert "Magento backend catalog cost without currency symbol" as Cost…

[orlangur]

… column must not be added to grid by default

This reverts commit 85beeec.

Description (*)

Manual testing scenarios (*)

1. Open product grid and make sure Cost column is absent by default
2. Magento backend catalog "Cost" without currency symbol #20906 should be still reproducible

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)

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[orlangur]

@dmytro-ch please review this PR as you was the first to notice invalid changes in #21911 (review)

[magento-engcom-team]

Hi @dmytro-ch, thank you for the review.
ENGCOM-5067 has been created to process this Pull Request

[dmytro-ch]

Nice catch @orlangur!
I totally agree that the issue with currency symbol should be fixed in a proper way.
It's not possible to make all the price attributes visible in the product grid by default in order to fix the issue.
Thank you.

[VasylShvorak]

✔️ QA passed

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