When upstream 2.6 branches are ready we need to create CPaaS configuration for maistra 2.6.

AC:

• servicemesh product repo is updated to provide ossm-2.6 version
• new branches with correct config for 2.6 in proxy and containers midstream repos are added
• honeybadger configution is created for ossm 2.6
• 2.6 builds work the same way like 2.5 builds (created for each change in upstream repos)