Added app isolation attribute to tests in EavSetupTest

[stollr]

Description (*)

The proposed changes add AppIsolation attributes to two tests of the EavSetupTest, because they affect global state (adding error messages to the Magento\Eav\Model\Validator\Attribute\Code service) which will affect further tests that try to add EAV attributes.

Related Pull Requests

Fixed Issues (if relevant)

1. Fixes [IntegrationTests] Tests in EavSetupTest affect global state #39616.

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)
• README.md files for modified modules are updated and included in the pull request if any README.md predefined sections require an update
• All automated tests passed successfully (all builds are green)

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[stollr]

@magento run all tests

[stollr]

@magento run all tests

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• dev/tests/integration/testsuite/Magento/Eav/Setup/EavSetupTest.php: Language not supported