iris: track reset signalling instead of replacing the context

iris: track reset signalling instead of replacing the context

Instead of creating a new context when a reset is encountered, we now
track whether the reset was reported back to the application. According
to the spec, the application should poll the reset status and recreate
the context when NO_ERROR encountered after a RESET.

From the EXT_robustness spec:

5. How should the application react to a reset context event?

RESOLVED: For this extension, the application is expected to query
the reset status until NO_ERROR is returned. If a reset is encountered,
at least one *RESET* status will be returned. Once NO_ERROR is again
encountered, the application can safely destroy the old context and
create a new one.

Signed-off-by: Rohan Garg <rohan.garg@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24224>