CI duplicate maven configuration entries

[jstastny-cz]

Adjusting branch.yaml configuration to split maven related configurations for nightly and release.

Part of ensemble:

• CI duplicate maven configuration entries incubator-kie-kogito-pipelines#1259
• CI duplicate maven configuration entries incubator-kie-drools#6132
• CI duplicate maven configuration entries incubator-kie-optaplanner#3135
• CI duplicate maven configuration entries incubator-kie-optaplanner-quickstarts#635
• CI duplicate maven configuration entries incubator-kie-kogito-runtimes#3738
• CI duplicate maven configuration entries incubator-kie-kogito-apps#2121
• CI duplicate maven configuration entries #2026

The scope of changes:

• maven settings.xml reference (config file id pointing at pre-defined config file in jenkins)
• artifacts upload repository
  • url - mostly informational, should not be needed for deploy itself (inheriting that configuration from apache parent)
  • credentials-id - the important part, allowing to configure different credentials for nightly and release.

Notes:

• in some places the configuration variants denoted as nightly are used in other places too (e.g. setup-branch).