cl_ext_image_raw10_raw12 and OpenCL 1.2 dependency

[cl_ext_image_raw10_raw12](https://registry.khronos.org/OpenCL/specs/3.0-unified/html/OpenCL_API.html#cl_ext_image_raw10_raw12) lists a dependency on OpenCL 1.2. Does this refer to the OpenCL device version, the OpenCL C version, or both?

Specifically, if my device is OpenCL 1.2 or later (as determined by `CL_DEVICE_VERSION`), and I compile an OpenCL program with `-cl-std=CL1.1`, is the extension supported?

This question was partially inspired by this draft CTS PR: https://github.com/KhronosGroup/OpenCL-CTS/pull/2376#issuecomment-3711642822

Same question applies to cl_ext_image_unorm_int_2_101010, cl_ext_image_unsigned_10x6_12x4_14x2, and some vendor extensions as well.

Start with the OpenCL API specification section for cl_ext_image_raw10_raw12 and compare its OpenCL 1.2 dependency wording with the related extensions named in the issue. Review the linked OpenCL-CTS pull request and the meanings of CL_DEVICE_VERSION and -cl-std=CL1.1. Done means providing an agreed specification clarification that resolves whether the dependency applies to the device version, OpenCL C version, or both.

Written by the indexing model from the issue text.