[Backport] Magento backend catalog cost without currency symbol

[mage2pratik]

Original Pull Request

#20907

Description (*)

Fixed Magento backend catalog "Cost" without currency symbol.

Fixed Issues (if relevant)

1. Magento backend catalog "Cost" without currency symbol #20906: Magento backend catalog "Cost" without currency symbol

Manual testing scenarios (*)

1. Navigate to admin catalog product grid
2. Using "Columns" selection add 'Cost' column in the grid

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 @mage2pratik. Thank you for your contribution
Here is some useful tips how you can test your changes using Magento test environment.
Add the comment under your pull request to deploy test or vanilla Magento instance:

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[magento-engcom-team]

Hi @VladimirZaets, thank you for the review.
ENGCOM-4254 has been created to process this Pull Request

[sivaschenko]

@magento-engcom-team give me test instance

[magento-engcom-team]

Hi @sivaschenko. Thank you for your request. I'm working on Magento instance for you

[magento-engcom-team]

Hi @sivaschenko, here is your new Magento instance.
Admin access: https://pr-21157.instances.magento-community.engineering/admin
Login: admin Password: 123123q

[ghost]

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