GSD-2023-1002019 drm/i915: Fix potential context UAFs

drm/i915: Fix potential context UAFs This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v6.1.7 by commit b696c627b3f56e173f7f70b8487d66da8ff22506, ...