Pulp

Use Qemu emulation on GHA for Vagrant tests

Adapted from: https://github.com/pulp/pulplift/pull/66 "RFC: Testing nested Virtualization"

Implementation Includes:

1. Upgrade Qemu from 4.4 to 5.2 from our PPA to address a severe bug affecting CentOS 7 guests, they could not even validate SSL certs with curl / yum or create the Pulp postgres database.
2. Upgrade the rest of the virtualization stack on Ubuntu
3. Address the EL8 vagrant-sshfs workaround task failing due to a GPG signature mismatch.
4. Workaround a bug with VM storage on the newer virtualization stack.
5. Switch the boxes used on CentOS 7 for more recent updates.
6. Reducing how long the pulp health check may take, particularly when there is a connection timed out.

workaround #8095: FIPS failure in geerlingguy.postgresql by using an old version. https://pulp.plan.io/issues/8095

workaround #7993: pulp_installer fails to create the database on EL7 when LANG=C.UTF-8 https://pulp.plan.io/issues/7993

fixes: #7884 Move the pulp_installer Vagrant tests off Travis https://pulp.plan.io/issues/7884

Use Qemu emulation on GHA for Vagrant tests

Adapted from: https://github.com/pulp/pulplift/pull/66 "RFC: Testing nested Virtualization"

Implementation Includes:

1. Upgrade Qemu from 4.4 to 5.2 from our PPA to address a severe bug affecting CentOS 7 guests, they could not even validate SSL certs with curl / yum or create the Pulp postgres database.
2. Upgrade the rest of the virtualization stack on Ubuntu
3. Address the EL8 vagrant-sshfs workaround task failing due to a GPG signature mismatch.
4. Workaround a bug with VM storage on the newer virtualization stack.
5. Switch the boxes used on CentOS 7 for more recent updates.
6. Reducing how long the pulp health check may take, particularly when there is a connection timed out.

workaround #8095: FIPS failure in geerlingguy.postgresql by using an old version. https://pulp.plan.io/issues/8095

workaround #7993: pulp_installer fails to create the database on EL7 when LANG=C.UTF-8 https://pulp.plan.io/issues/7993

fixes: #7884 Move the pulp_installer Vagrant tests off Travis https://pulp.plan.io/issues/7884