[Issue] Upgrade PHPStan to version 1.5

[m2-assistant]

This issue is automatically created based on existing pull request: #35234: Upgrade PHPStan to version 1.5

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Description (*)

PHPStan 1.5 was released yesterday. This PR upgrades PHPStand 1.4.9 to 1.5.0.

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)

[github-jira-sync-bot]

✅ Jira issue https://jira.corp.magento.com/browse/AC-2876 is successfully created for this GitHub issue.

[m2-assistant]

✅ Confirmed by @sdzhepa. Thank you for verifying the issue.
Issue Available: @sdzhepa, You will be automatically unassigned. Contributors/Maintainers can claim this issue to continue. To reclaim and continue work, reassign the ticket to yourself.