teclo5g: use env vars for reserved and isolated cpus

Following
openshift/cluster-node-tuning-operator#909, we now can provide the CPU specifications for the performance profile and
considering the u/s CI runs on AWS-generated clusters with constant
CPU settings, according to the PPC CPU calculation using must-gather
data, we export the result in environment variables indicating reserved and isolated CPUs.

Note: this will need to be maintained should environment settings
change.

Signed-off-by: shajmakh <shajmakh@redhat.com>

ci-operator/step-registry/telco5g/cnf/tests/telco5g-cnf-tests-commands.sh

@@ -247,6 +247,8 @@ export TEST_RUN_FEATURES="${TEST_RUN_FEATURES:-$FEATURES}"
 export SKIP_TESTS_FILE="${SKIP_TESTS_FILE:-${SHARED_DIR}/telco5g-cnf-tests-skip-list.txt}"
 export SCTPTEST_HAS_NON_CNF_WORKERS="${SCTPTEST_HAS_NON_CNF_WORKERS:-false}"
 export XT_U32TEST_HAS_NON_CNF_WORKERS="${XT_U32TEST_HAS_NON_CNF_WORKERS:-false}"
+export RESERVED_CPU_SET="0,2"
+export ISOLATED_CPU_SET="1,3"
 
 export CNF_REPO="${CNF_REPO:-https://github.com/openshift-kni/cnf-features-deploy.git}"
 export CNF_BRANCH="${CNF_BRANCH:-master}"