v1.46: POM cleanup and dependency upgrades

What's Changed

Primarily, a minor bump of the AMQP client (to the latest) and patch bumps of logging dependencies. Everything else should be related to building and testing.

Details

• Bump plugins and clean up POM and build workflows; format code by @dependabot in #137
• Bump ch.qos.logback:logback-classic from 1.2.11 to 1.2.13 in /conduit-bom by @dependabot in #140
• Bump whelk-io/maven-settings-xml-action from 21 to 22 by @dependabot in #144
• Bump com.rabbitmq:amqp-client from 5.14.2 to 5.21.0 by @dependabot in #145
• Bump org.assertj:assertj-core from 3.25.3 to 3.26.0 by @dependabot in #147
• Bump org.sonatype.plugins:nexus-staging-maven-plugin from 1.6.13 to 1.7.0 by @dependabot in #148
• Bump org.mockito:mockito-core from 4.3.1 to 5.12.0 by @dependabot in #143

Full Changelog: v1.45...v1.46