Update the test requirements

Give molecule a version pin since we made changes to support v5
specifically. We can also remove the ansible-lint, flake8, and yamllint
requirements since molecule is no longer performing any linting.

requirements-test.txt

@@ -8,10 +8,11 @@
 # We need at least version 6 to correctly identify Amazon Linux 2023
 # as using the dnf package manager.
 ansible>=6,<7
-ansible-lint>=5,<6
-flake8
-molecule
+# With the release of molecule v5 there were some breaking changes so
+# we need to pin at v5 or newer. However, v5.0.0 had an internal
+# dependency issue so we must use the bugfix release as the actual
+# lower bound.
+molecule>=5.0.1
 molecule-plugins[docker]
 pre-commit
 pytest-testinfra
-yamllint