Add OpenCL_CTS (x86_64/linux) to planned testing

[alan-forbes-cp]

Overview

Add Opencl_cts (x86_64/linux) to planned testing.

Reason for change

Required for future releases.

Description of change

Taking tornado as an example, opencl_cts tests are built, run and artefacts archived.

Anything else we should know?

• x86_64 linux only
• "quick" test runs by default
• git patches added to .github/patches
• the run inputs inputs.cts_profile and inputs.cities_args (offered previously) have been excluded
• ock archive now includes clc
• note that cllayerinfo has not been added to the uploaded opencl-cts artefact
• see workflow summary in "build/run OpenCL_CTS" under checks below for an example of the artefacts
• note that the following single check fail exists (known issue at time of writing):

Failed:            1 (  1.6 %)
Failed tests:
  cl12/api/test_api