crocus: fix refcnt imbalance related to framebuffer

crocus: fix refcnt imbalance related to framebuffer

Indeed, the hardcoded framebuffer cleanup doesn't handle "resolve".

For instance, this issue is triggered with "piglit/bin/glx-copy-sub-buffer -samples=2 -auto"
while setting GALLIUM_REFCNT_LOG=refcnt.log.

Fixes: f5bde99cbdd2 ("gallium: plumb resolve attachments through from frontends -> pipe_framebuffer_state")
Signed-off-by: Patrick Lerda <patrick9876@free.fr>
Reviewed-by: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22554>