Update sample project assets

[ds5678]

PR Details

This pull request updates the sample projects with reimported assets.

Related Issue

I was preparing to do other pull requests related to the sample projects, and the Game Studio prompted me to reimport a bunch of assets. Apparently, their data format has changed a bit since creation.

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My change requires a change to the documentation.
• I have added tests to cover my changes.
• All new and existing tests passed.
• I have built and run the editor to try this change out.

[Kryptos-FR]

I believe this was introduced by #3270 where asset references now include a prefix with the path to the package they originate from.

[Kryptos-FR]

A few remarks and questions. Did you make sure to run every single sample?

[Kryptos-FR]

@xen2 this PR made me realize that we don't have CI jobs for the samples.

[ds5678]

Did you make sure to run every single sample?

I just finished testing after my latest set of changes. I ran every single sample (except VR) and verified their functional behavior.