Align all general DebugUtilsMessengerCallbacks as in hpp_hello_triangle.

[asuessenbach]

Description

As prepared with #1560, all general purpose debug callbacks are equalized with this PR.

One question, though: should the *hello_triangle* samples really hold their own debug callback, or should we prefer to use one provided by the framework?

Build tested on Win11 with VS2026. Run tested on Win11 with NVidia GPU.

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[SaschaWillems]

One question, though: should the hello_triangle samples really hold their own debug callback, or should we prefer to use one provided by the framework?

IMO we should leave it that way. Those samples are deliberately written to be as stand-alone as possible.