New sample for VK_EXT_image_compression_control

[JoseEmilio-ARM]

I am currently working on a Performance/Extension sample for VK_EXT_image_compression_control, the plan is that it will illustrate:

• How to query for fixed rate compression support
• How to enable fixed rate compression support
• How to measure the bandwidth benefits of compression

Will use this issue for status updates, and will assign it to a PR in the near future, feedback welcome!