chore(cd): remove EOL distros (#14873)

KAG-8998

Author: Water-Melon

.github/matrix-full.yml

@@ -7,10 +7,6 @@ build-packages:
 # check-manifest-suite: the check manifest suite as defined in scripts/explain_manifest/config.py
 
 # Ubuntu
-- label: ubuntu-20.04
-  image: ubuntu:20.04
-  package: deb
-  check-manifest-suite: ubuntu-20.04-amd64
 - label: ubuntu-22.04
   image: ubuntu:22.04
   package: deb
@@ -120,12 +116,6 @@ scan-vulnerabilities:
 
 release-packages:
 # Ubuntu
-- label: ubuntu-20.04
-  package: deb
-  artifact-from: ubuntu-20.04
-  artifact-version: 20.04
-  artifact-type: ubuntu
-  artifact: kong.amd64.deb
 - label: ubuntu-22.04
   package: deb
   artifact-from: ubuntu-22.04