feat: add Pulp upload scripts and pipeline integration

[vamahaja]

This PR will introduce an optional path to publish built RPM/DEB artifacts to Pulp alongside the existing Chacra flow.

• Introduce a PULP_UPLOAD boolean parameter (default false) on the ceph-dev job.
• Add scripts/setup_pulp.sh to install pulp-cli (with pulp-cli-deb) via uv and write client config from Jenkins credentials.
• Add scripts/pulp_upload.sh to upload discovered packages, attach them to the target repository, create a publication, and publish a distribution with project/version/ref/arch/sha labels.
• Update the Jenkinsfile to install/configure the Pulp client when forcing a rebuild with Pulp upload while Chacra already has artifacts, and to invoke pulp_upload.sh after chacra_upload.sh when THROWAWAY is not true and PULP_UPLOAD is true.

[djgalloway]

Can't all of the exports go inside the if statement at the end? The only reason we export CHACRA_URL and subsequent vars above is because we use chacra unconditionally.

So

if [ "$THROWAWAY" != "true" && "$PULP_UPLOAD" == "true" ]; then
  export PULP_PROJECT="${PULP_PROJECT}"
  export OS_NAME="${os.name}"
  export OS_VERSION="${os.version}"
  export OS_VERSION_NAME="${os.version_name}"
  export OS_PKG_TYPE="${os.pkg_type}"
  export SHA1="${env.SHA1}"
  export FLAVOR="${env.FLAVOR}"
  ./scripts/pulp_upload.sh
else
  echo "Skipping pulp upload because PULP_UPLOAD=$PULP_UPLOAD"
fi

Or similar

[djgalloway]

jenkins retest

[djgalloway]

My comment is a nit. I'd like to push this to Jenkins to make sure we don't run over the character limit we saw a few months ago but otherwise okay with this. Exciting stuff! 👍

[zmc]

Generally looks great! I agree with David's suggestion. I think we should likely have PULP_URL be a parameter defaulting to the host we have in openshift.