[Test] Remove Al23 from OpenFoam tests as it is not supported OS.

Author: gmarciani

tests/integration-tests/configs/openfoam.yaml

@@ -4,5 +4,5 @@ test-suites:
       dimensions:
         - regions: ["euw1-az1"]  # do not move, unless capacity reservation is moved as well
           instances: ["c5n.18xlarge"]
-          oss: ["alinux2", "alinux2023", "ubuntu2004"] # Ubuntu22.04, RHEL8 and Rocky8 are not supported
+          oss: ["alinux2", "ubuntu2004"] # Amazon Linux 2023, Ubuntu22.04, RHEL8 and Rocky8 are not supported
           schedulers: ["slurm"]