cl_khr_egl_image untested

No tests are currently exercising cl_khr_egl_image. Here are a few scenarios we should cover

## Positive testing

- TBD end-to-end testing with other API (e.g. OpenGL) producer and consumer
- Test that `clGetEventInfo` returns the right value for `CL_EVENT_COMMAND_TYPE` for events returned by `clEnqueueAcquireEGLObjectsKHR` or `clEnqueueReleaseEGLObjectsKHR`

## Negative testing

- All testable error codes that can be returned by `clCreateFromEGLImageKHR`, `clEnqueueAcquireEGLObjectsKHR` or `clEnqueueReleaseEGLObjectsKHR`
- Test that a command using a memory object that hasn't been acquired fails with `CL_EGL_RESOURCE_NOT_ACQUIRED_KHR`

Start by locating the existing CTS entry points for clCreateFromEGLImageKHR, clEnqueueAcquireEGLObjectsKHR, clEnqueueReleaseEGLObjectsKHR, and clGetEventInfo. Add positive and negative coverage for the listed scenarios, including CL_COMMAND_TYPE and CL_EGL_RESOURCE_NOT_ACQUIRED_KHR, and use the resulting tests to verify the extension behavior.

Written by the indexing model from the issue text.