Update CODEOWNERS to point to infra team, remove extraneous GH orgs

Signed-off-by: Andy Tinkham <andy.tinkham@cyberark.com>

Author: andytinkham

.github/CODEOWNERS

@@ -1,10 +1,10 @@
-* @cyberark/community-and-integrations-team @conjurinc/community-and-integrations-team @conjurdemos/community-and-integrations-team
+* @cyberark/conjur-infra-team
 
 # Changes to .trivyignore require Security Architect approval
-.trivyignore @cyberark/security-architects @conjurinc/security-architects @conjurdemos/security-architects
+.trivyignore @cyberark/security-architects
 
 # Changes to .codeclimate.yml require Quality Architect approval
-.codeclimate.yml @cyberark/quality-architects @conjurinc/quality-architects @conjurdemos/quality-architects
+.codeclimate.yml @cyberark/quality-architects
 
 # Changes to SECURITY.md require Security Architect approval
-SECURITY.md @cyberark/security-architects @conjurinc/security-architects @conjurdemos/security-architects
+SECURITY.md @cyberark/security-architects