Add tensor_image_aliasing and postprocessing_with_vgf samples

[matthewsloyanARM]

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Fixes #

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[gary-sweet]

I see build errors with this change:

CMake Error at third_party/ai-ml-sdk-vgf-library/cmake/flatbuffers.cmake:34 (find_program):
Could not find FLATC_PATH using the following names: flatc23, flatc,
flatc23
Call Stack (most recent call first):
third_party/ai-ml-sdk-vgf-library/CMakeLists.txt:36 (include)

[SaschaWillems]

Looks like this is caused by one of the new third party dependencies. I see two new ones in there:

• flatbuffers
• ai-ml-sdk-vgf-library

Adding new submodules will require people that already cloned the repo to update these submodules, or else they'll be empty. Not sure if that's also the cause for the CI failures.

In light of the samples already having serious issues with build times and complexity, I'm not sure if we want to add in even more dependencies (we're already shy of 20 submodules). Are these really required for this sample?

[SaschaWillems]

Aside from that, the sample works fine for me on Windows with an Nvidia RTX4070 using the latest ML emulation layer (0.8.0).