Pin Node.js to v20.x in quay-test-console image

Fix Cypress test failures caused by Node.js v22 compatibility issues.
The latest LTS Node.js (v22.x) is incompatible with Cypress 12.6.0,
causing "ERR_FAILED (-2) loading 'about:blank#blocked'" errors.

Pinning to Node.js 20.x resolves the issue while maintaining LTS support.

Error details:
- The new-window event is deprecated in Electron 106 (bundled with Cypress 12.6.0)
- Node.js v22 has stricter security policies that block Electron initialization
- This affects all tests using the quay-test-console image including
  the quay-e2e-tests-quay316-api-testing job

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: LiZhang19817

ci-operator/config/quay/quay-tests/quay-quay-tests-master.yaml

@@ -11,7 +11,7 @@ build_root:
 images:
 - dockerfile_literal: |
     FROM src
-    RUN curl --silent --location  https://rpm.nodesource.com/setup_lts.x | bash - && \
+    RUN curl --silent --location  https://rpm.nodesource.com/setup_20.x | bash - && \
         curl --silent --location https://dl.yarnpkg.com/rpm/yarn.repo | tee /etc/yum.repos.d/yarn.repo && \
         PACKAGES="openssh-clients httpd-tools nodejs yarn xorg-x11-server-Xvfb gtk2-devel gtk3-devel libnotify-devel GConf2 nss libXScrnSaver alsa-lib skopeo bzip2 jq python3.9" && \
         yum install --setopt=tsflags=nodocs -y $PACKAGES && \