Fix installation of ansible venv

ansible-test is included in ansible package. Also, on Fedora 37 with
python 3.11, pip is missing. By using ensurepip we solve that issue.

Makefile

@@ -62,7 +62,8 @@ test-integration:
 	mkdir -p .venv/$(ansible)
 	python -m venv .venv/$(ansible)
 	source .venv/$(ansible)/bin/activate
-	python -m pip install --disable-pip-version-check --user https://github.com/ansible/ansible/archive/$(ansible).tar.gz ansible-test
+	python -m ensurepip
+	python -m pip install --disable-pip-version-check --user https://github.com/ansible/ansible/archive/$(ansible).tar.gz
 	-set -x; ansible-test integration $(target) -v --color --coverage --diff --docker $(docker_image) --docker-network podman $(_continue_on_errors) $(_keep_containers_alive) --python $(python); set +x
 	rm tests/integration/db_engine_version
 	rm tests/integration/connector

TESTING.md

@@ -14,7 +14,15 @@ Everytime you push on your fork or you create a pull request, both workflows run
 
 You can use GitHub to run ansible-test either on the community repo or your fork. But sometimes you want to quickly test a single version or a single target. To do that, you can use the Makefile present at the root of this repository.
 
-Actually, the makefile only support Podman.
+For now, the makefile only support Podman.
+
+### Requirements
+
+- python 3.8+
+- make
+
+
+### Makefile options
 
 The Makefile accept the following options: