Invalid VkImageCreateInfo->sharingMode validation layer error in Release builds of msaa/16bit_arithmetic samples

I see the following validation layer error when running Release builds of the msaa/16bit_arithmetic samples when the samples are built using `-DCMAKE_BUILD_TYPE=RelWithDebInfo -DVKB_VALIDATION_LAYERS=ON`.



`

[error] 81114962 - VUID-VkImageCreateInfo-sharingMode-parameter: Validation Error: [ VUID-VkImageCreateInfo-sharingMode-parameter ] | MessageID = 0x4d5b752 | vkCreateImage(): pCreateInfo->sharingMode (23330) does not fall within the begin..end range of the VkSharingMode enumeration tokens and is not an extension added token.

The Vulkan spec states: sharingMode must be a valid VkSharingMode value (https://www.khronos.org/registry/vulkan/specs/1.3-extensions/html/vkspec.html#VUID-VkImageCreateInfo-sharingMode-parameter)

`



This can be fixed by conditionally setting sharingMode in https://github.com/KhronosGroup/Vulkan-Samples/blob/f7e97a19378255e01b51acc211bf6b31c849a34c/framework/core/image.h#L120 i.e. `create_info.sharingMode        = create_info.queueFamilyIndexCount != 0 ? VK_SHARING_MODE_CONCURRENT : VK_SHARING_MODE_EXCLUSIVE;`. I didn't raise a PR as I'm not particularly familiar with this codebase and I wasn't sure whether there was a reason this wasn't done originally.



Vulkan-Samples built with `gcc (Ubuntu 13.2.0-23ubuntu4) 13.2.0` on `Ubuntu 24.04`.



Reproduced on:

`

	driverID           = DRIVER_ID_MESA_LLVMPIPE

	driverName         = llvmpipe

	driverInfo         = Mesa 24.3~git2410240600.c0bcea~oibaf~n (git-c0bceaf 2024-10-24 noble-oibaf-ppa) (LLVM 18.1.8)

`



Tested on commit f7e97a19378255e01b51acc211bf6b31c849a34c.

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