RHOCP 4 installation failing for bootstrap node not using proxy variables

Issue

• The release-image process in the bootstrap node does not contain the proxy configuration.

• The release-image fails with timeout while pulling the container image:

  Jan 25 12:15:07 bootstrap.example.com release-image-download.sh[6837]: time="2024-01-25T12:15:07Z" level=warning msg="Failsource docker://quay.io/openshift-release-dev/ocp-release@sha256:78f08839886fb2896857f95de0347b8f67ebcff16591b9d7aec87a20406b28s://quay.io/v2/\": dial tcp 10.0.0.2:443: i/o timeout"
  

• If the proxy variable contains the % character systemd on the bootstrap node returns the following error:

  Jan 24 13:40:41 localhost systemd[1]: /etc/systemd/system.conf.d/10-default-env.conf:3: Failed to resolve specifiers in HTTPS_PROXY=http://testuser%40example.com:12345678@10.0.0.1:443, ignoring: Invalid slot