DEICH-6264 - Euler - upgrade to Java 17

Commits: DEICH-6264 - CR fixes

DEICH-6264 - Upgraded to Spring Boot latest stable - 2.7.2 + jsonld-java

DEICH-6264 - RIP springFox (🪦💐) - All hail the new Caesar (AC⚡️DC 🤘🎸🤘): springdoc-openai

DEICH-6264 - String to text block in api v2 SetDataRequest classes. DEICH-6264 - Smaller code fixes - mainly SonarLint issues.

DEICH-6264 - First steps to upgrade to Java 17

Quite a lot of dependencies had to be upgraded. Java 11 is from 2018, and a lot has happened in 4 years.

-Upgraded Spring boot, and numerous third party libraries required by upgrade to Java 17.
-Added @EqualsAndHashCode(callSuper=true) to no.deichman.euler.api.resource.jsonapi.vos.* classes.
-Minor code improvements allowed by Java 17 and the Java language (like method ref, which was supported by Java 11 as well).

Closes DEICH-6264