[Maintenance] Integrations + Tools: Java 25 bump

[devtobi]

Relevant component

refarch-tools, refarch-integrations

Problem description (optional)

No response

Desired solution

Integrations and Tools should be bumped to Java 25, see it-at-m/refarch-templates#1569 for reference.

Note: This might be a breaking change due to possible incompatibility when used in <25 Java projects.

Considered alternatives (optional)

No response

Additional context (optional)

No response

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