[Issue] Fixed use inconsistently viewModels in codebase

[m2-assistant]

This issue is automatically created based on existing pull request: #31503: Fixed use inconsistently viewModels in codebase

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Description (*)

Replace viewModel by view_model in codebase! Somewhere in code developers use both approach view_model and viewModel. This can lead to inconsistent and make more noise for dev experience
Just refactor a little code

Related Pull Requests

Fixed Issues (if relevant)

1. Fixes magento/magento2#<issue_number>

Manual testing scenarios (*)

1. ...
2. ...

Questions or comments

CC @dmytro-ch pr update related docs update

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 are green)