Ensure native jinja is off for non-native tests (#71914)

Even if native jinja is off by default now it is better to be
explicit and it will be prepared in case we changed that default.

test/integration/targets/set_fact/runme.sh

@@ -26,5 +26,5 @@ fi
 ansible-playbook -i inventory --flush-cache "$@" set_fact_no_cache.yml
 
 # Test boolean conversions in set_fact
-ansible-playbook -v set_fact_bool_conv.yml
+ANSIBLE_JINJA2_NATIVE=0 ansible-playbook -v set_fact_bool_conv.yml
 ANSIBLE_JINJA2_NATIVE=1 ansible-playbook -v set_fact_bool_conv_jinja2_native.yml

test/integration/targets/templating_lookups/runme.sh

@@ -9,4 +9,4 @@ ansible-playbook template_lookup_vaulted/playbook.yml --vault-password-file temp
 ansible-playbook template_deepcopy/playbook.yml -i template_deepcopy/hosts "$@"
 
 # https://github.com/ansible/ansible/issues/66943
-ansible-playbook template_lookup_safe_eval_unicode/playbook.yml "$@"
+ANSIBLE_JINJA2_NATIVE=0 ansible-playbook template_lookup_safe_eval_unicode/playbook.yml "$@"