[Issue] Simplify setup wizard: remove angular, combine all data on one page, etc

[m2-assistant]

This issue is automatically created based on existing pull request: #32475: Simplify setup wizard: remove angular, combine all data on one page, etc

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Description (*)

Simplify setup wizard code:

• remove angular
• combine landing+license on the same page
• remove other unused files

This could be one of the steps to remove laminas MVC and other dependencies used only for setup scripts and which are not necessary after removing the main Setup Wizard logic

Related Pull Requests

Fixed Issues (if relevant)

Manual testing scenarios (*)

Open setup wizard /setup/ and check that both landing and license pages are the same as before

Questions or comments

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)