Vulkan: Enable a subset of ImageTest colorspace tests This patch does the following - 1. Expose EGL_KHR_image_gl_colorspace only if the underlying ICD supports VK_KHR_image_format_list extension 2. Create VkImageViews from EGLimage's format 3. Fix bugs in ImageTest colorspace tests Bug: angleproject:3756 Bug: angleproject:5281 Test: angle_end2end_tests.exe --gtest_filter=ImageTest*Colorspace*Vulkan Change-Id: I618ae009e83d0a6b27a0a50165f736784717e404 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2523670 Commit-Queue: Mohan Maiya <m.maiya@samsung.com> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>