vulkan/overlay: record all select metrics into output file

vulkan/overlay: record all select metrics into output file

The output looks something like this (csv style) :

fps, frame, frame_timing(us), submit, draw_indexed, pipeline_graphics, acquire_timing(us), vert_invocations, frag_invocations, gpu_timing(ns)
480.55, 242, 501512, 247, 1444, 1204, 714, 5827272, 113043296, 121424174
467.80, 234, 500214, 234, 1412, 1176, 648, 5635680, 109436188, 117743760
424.37, 213, 501923, 213, 2130, 1704, 623, 5132448, 99657292, 105474683
472.15, 237, 501962, 237, 2370, 1896, 667, 5710752, 110924644, 122226004
411.32, 206, 500826, 206, 2060, 1648, 709, 4963776, 96491764, 95333273
458.87, 230, 501228, 230, 2300, 1840, 634, 5542080, 107758204, 123112090
475.01, 238, 501044, 238, 2380, 1904, 631, 5734848, 111477480, 122087426
471.08, 236, 500972, 236, 2360, 1888, 655, 5686656, 110498496, 114816162

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>