egl: Add more errors cases during context creation
In 9cc3e842 an explicit check whether drivers support PIPE_CAP_ROBUST_BUFFER_ACCESS_BEHAVIOR was added to EGL_CONTEXT_OPENGL_ROBUST_ACCESS_EXT. Add respective checks in similar places as well.
Split out from !30666 (closed) so they can land without waiting for VK-GL-CTS fixes.
Edited by Robert Mader