anv/cmd_buffer: Don't temporarily enable CCS_E within a render pass

anv/cmd_buffer: Don't temporarily enable CCS_E within a render pass

Compressing a render target and decompressing it in the same
single-subpass render pass may waste bandwidth. While this may be
beneficial in some circumstances, it does not help in all. Reclaims
about 1.95% FPS for Dota 2 on some configurations.

v2 (Jason Ekstrand):
- Provide a more thorough comment
- Enable CCS_D for input attachments
v3 (Jason Ekstrand):
- Provide performance numbers

Signed-off-by: Nanley Chery <nanley.g.chery@intel.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>