RHOCP4 cluster installation failing with special charaters in proxy credentials

Issue

• Installation falling while using '#' or ASCII value of '#' as "%23" in proxy credentials.

• In bootstrap node, release-image.service will show following logs.

  $ journactl -f -u release-image.service
  
  Jan 26 10:55:09 abcd-proxy1-12345-bootstrap-0 systemd[1]: Starting Download the OpenShift Release Image...
  Jan 26 10:55:10 abcd-proxy1-12345-bootstrap-0 release-image-download.sh[1801]: Pulling 
  registry.ci.openshift.org/ocp/release@sha256:ca292996876487d29e8416ca9353935d1e986a190136abfa3701f806350583f1...
  Jan 26 10:56:10 abcd-proxy1-12345-bootstrap-0 release-image-download.sh[1903]: time="2024-01-26T10:56:10Z" 
  level=warning msg="Failed, retrying in 1s ... (1/3). Error: initializing source docker://registry.ci.openshift.org/ocp/release@sha256:ca292996876487d29e8416ca9353935d1e986a190136abfa3701f806350983f1: pinging container registry 
  registry.ci.openshift.org: Get \"https://registry.ci.openshift.org/v2/\": dial tcp 10.x.x.x:443: i/o timeout"