v3dv: more frame tiling refactors

v3dv: more frame tiling refactors

This puts all the information required to setup frame tiling into
v3dv_frame_tiling so we no longer need a framebuffer to start a
frame. This makes the code simpler, since frame tiling calculations
happen automatically when we start a new frame and simplifies
the implementation of copy and clear operations that used to
requiere that we setup a fake framebuffer with no actual attachments,
which was a bit of a kludge.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6766>