[CI][CTS] Add fixed ref for cts

This patch adds a new input to fix the specific version of cts. In
general it's needed for sycl-rel as the cts is continuously changing.

Author: KornevNikita

.github/workflows/sycl-linux-run-tests.yml

@@ -48,6 +48,11 @@ on:
           Note: it doesn't affect ./devops/actions/run-tests/* as these actions
           call checkout again and therefore override the devops directory, so
           configs/dependecies from input.ref are used.
+      sycl_cts_ref:
+        description: "Commit SHA or branch to checkout"
+        type: string
+        default: "main"
+        required: False
 
       sycl_toolchain_artifact:
         type: string
@@ -314,3 +319,4 @@ jobs:
         sycl_cts_artifact: ${{ inputs.sycl_cts_artifact }}
         target_devices: ${{ inputs.target_devices }}
         retention-days: ${{ inputs.retention-days }}
+        sycl_cts_ref: ${{ inputs.sycl_cts_ref }}

devops/actions/run-tests/cts/action.yml

@@ -11,6 +11,10 @@ inputs:
     required: true
   retention-days:
     required: false
+  sycl_cts_ref:
+    description: "Commit SHA or branch to checkout"
+    required: false
+    default: "main"
 
 runs:
   using: "composite"
@@ -21,8 +25,7 @@ runs:
     with:
       path: khronos_sycl_cts
       repository: 'KhronosGroup/SYCL-CTS'
-      ref: 'main'
-      default_branch: 'main'
+      ref: ${{ inputs.sycl_cts_ref }}
       cache_path: "/__w/repo_cache/"
   - name: SYCL CTS GIT submodules init
     if: inputs.cts_testing_mode != 'run-only'