BACKLOG-21361: Replaced most of systemName adapter by override

[tdraier]

JIRA

https://jira.jahia.org/browse/BACKLOG-21361

Description

Main goal is to be able to use override to defined labels/description of system name - and at the same time, use same overrides to define other properties.

• Cleaned adaptSystemNameField from all stuff that could be replaced easily with overrides : label keys, read only (basic cases), selector options. Name initialization moved to getInitialValues().
• Fixed label key inconsistencies. Key format with "@" was decoded in unexpected order ( key location was before @ symbol ), generated keys was not in the same order, and resource bundle name was randomly replaced by osgi bundle name. In the end, replaced with ":" separator which has a clearer meaning ( module-name:label-key ), not using resource bundle names at all.
• Set "module-name" in all label keys to the bundle owning the json file as default, if not already set.
• Use substitutor on label and selection options values to be able to use the maxNameSize from jahia.properties.
• Adapted the json files for nt:base, jnt:page and jmix:systemNameReadOnly