Update shader interfaces to match sample's vertex input description

[SaschaWillems]

Description

This PR updates the vertex shaders for the dynamic rendering local read sample so that their interfaces match the attribute description of the pipeline. While the slight mismatch did not cause any issues, this is making things more correct.

Fixes #1367

General Checklist:

Please ensure the following points are checked:

• My code follows the coding style
• I have reviewed file licenses
• I have commented any added functions (in line with Doxygen)
• I have commented any code that could be hard to understand
• My changes do not add any new compiler warnings
• My changes do not add any new validation layer errors or warnings
• I have used existing framework/helper functions where possible
• My changes do not add any regressions
• I have tested every sample to ensure everything runs correctly
• This PR describes the scope and expected impact of the changes I am making

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• I have updated the header Copyright to reflect the current year (CI build will fail if Copyright is out of date)
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