[Backport]-issue-195196 Can't upload customer Image attribute programmatically

[Nazar65]

Original PR #19988

Description (*)

Could not load image for customer attribute, error: Base64 is not defined "

Fixed Issues (if relevant)

1. Can't work customer Image attribute programmatically #19983: Could not load image for customer attribute,

Manual testing scenarios (*)

1-Create customer attribute type file ->

$eavSetup = $this->eavSetupFactory->create(['setup' => $setup]);
        $eavSetup->addAttribute(
            \Magento\Customer\Model\Customer::ENTITY,
            'sample_attribute2',
            [
                'type'         => 'text',
                'label'        => 'Sample Attribute',
                'input'        => 'file',
                'required'     => false,
                'visible'      => true,
                'user_defined' => false,
                'position'     => 999,
                'system'       => 0,
            ]
        );
        $sampleAttribute = $this->eavConfig->getAttribute(Customer::ENTITY, 'sample_attribute');

        // more used_in_forms ['adminhtml_checkout','adminhtml_customer','adminhtml_customer_address','customer_account_edit','customer_address_edit','customer_register_address']
        $sampleAttribute->setData(
            'used_in_forms',
            ['adminhtml_customer','customer_register_address','customer_address_edit','customer_account_edit']

        );
        $sampleAttribute->save();

2. try to upload image on adminhtml customer edit.

Expected Result

No errors in Console, Image uploaded

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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[magento-engcom-team]

Hi @sivaschenko, thank you for the review.
ENGCOM-4366 has been created to process this Pull Request

[sivaschenko]

Hi @Nazar65 thanks for the backport, during testing, we discovered there is a JS error when creating a new customer in the admin panel on the PR code base, can you please check that.

[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.
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Login: admin Password: 123123q

[sivaschenko]

@Nazar65 sorry, I don't think your last commit was included during testing, we'll recheck including the last commit

[ghost]

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