[backport] Product attribute option manager's existing option check fails

[Nazar65]

Original Pull Request

#19451

Description (*)

Product attribute option manager's existing option check fails
Added strict flag to in_array

Fixed Issues (if relevant)

1. Product attribute option manager's existing option check fails #18246

Manual testing scenarios (*)

1. Add attribute options by calling \Magento\Catalog\Model\Product\Attribute\OptionManagement::add
2. Add attribute option that has admin scope value '01'.
3. Add another option for same attribute that has admin scope value '1'.

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 @Nazar65. Thank you for your contribution
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[ihor-sviziev]

Hi @Nazar65,
Could you create PR with the same changes to 2.3-develop branch at first?
Thank you!

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Update:
Ah, sorry, it's backport of fix that was already merged to 2.3-develop.

[ihor-sviziev]

Hi @Nazar65,
I double checked, PR that fixing this issue #19612 was already merged to 2.2-develop.

[ghost]

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[ihor-sviziev]

Duplicate of #19612

[Nazar65]

@ihor-sviziev ok thanks.