[SPIR-V] sizeof() error when structcontains `enum` or `enum class`

[Erfan-Ahmadi]

Description

DXC (trunk)
-T cs_6_8 -E main -spirv -Zpr -enable-16bit-types -Wno-c++14-extensions -Wno-c++1z-extensions -Wno-c++11-extensions -Wno-gnu-static-float-init -fspv-target-env=vulkan1.3
123

# For more information see the output window
DXC (trunk) - cached
<source>:20:47: error: invalid application of 'sizeof' to non-numeric type 'MainObject'
    vk::RawBufferStore<uint32_t>(0xdeadbeefu, sizeof(MainObject));
                                              ^

Steps to Reproduce
Godbolt link: https://godbolt.org/z/54eYaao4a
issue exists for DXIL as well: https://godbolt.org/z/MY57nYP7j
Environment
DXC Head on Godbolt