Font Texture is huge in Memory Profiler on Vulkan platform

Unity: Vulkan

2019.4.X

Since the client cannot reproduce this bug on 2020.3.37f1, we can now ignore this bug.

related ticket: 1328161

Font Texture is abnormly huge in Memory profiler(over 200MB) only on Vulkan platform. It's normal on GLES and other platforms.

It seems a issue of statistic because the real memory usage is not bigger than gles api version.