CentOS9: easy_install command is no longer available

[Takashi Kajinami]

When tempest::install_from_source is true, we install the python3-setuptools package and the install pip using easy_install.

However this method is no longer valid in CentOS 9 because easy_install command is not longer provided by the python3-setuptools.
(Actually it was invalid even in CentOS 8 because setuptools provide not easy_install command but only easy_install-3.6 command)

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/c/openstack/puppet-tempest/+/900618

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/openstack/puppet-tempest/+/900618
Committed: https://opendev.org/openstack/puppet-tempest/commit/e82af602ea8f70054b37274c10559e25910448ac
Submitter: "Zuul (22348)"
Branch: master

commit e82af602ea8f70054b37274c10559e25910448ac
Author: Takashi Kajinami <email address hidden>
Date: Fri Nov 10 23:15:37 2023 +0900

    Use package to install pip

    The easy_install command is no longer available in CentOS 9 (and even
    CentOS 8), and we should use package installation. Because RHEL has no
    pip package available now, the package installation is skipped with
    a warning message.

    Closes-Bug: #2043206
    Change-Id: Id70b4610f5e016ae69fc8ef2b81e2176f199fe87

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/puppet-tempest 24.0.0 release.