[Backport] Fixed #22396 config:set fails with JSON values

[shikhamis11]

Original Pull Request

#22513
Fixed #22396 config:set fails with JSON values

Preconditions (*)

1. 2.3.1

Steps to reproduce (*)

1. Try to set a config value for a config option that uses JSON values via the command line cli
2. i.e.: php bin/magento config:sataloginventory/item_options/min_sale_qty "{"32000":2,"0":2}"

Expected result (*)

1. Config is set to provided value

Actual result (*)

1. Config is set to empty value.

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)

[m2-assistant]

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[phoenix128]

Thank you @shikhamis11 for your contribution.

[magento-engcom-team]

Hi @phoenix128, thank you for the review.
ENGCOM-5306 has been created to process this Pull Request
✳️ @phoenix128, could you please add one of the following labels to the Pull Request?

Label	Description
Auto-Tests: Covered	All changes in Pull Request is covered by auto-tests
Auto-Tests: Not Covered	Changes in Pull Request requires coverage by auto-tests
Auto-Tests: Not Required	Changes in Pull Request does not require coverage by auto-tests

[engcom-Alfa]

✔️ QA Passed

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[m2-assistant]

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