Ignore generated pom by maven-shade-plugin and ci-friendly-flatten-maven-plugin

[philippe-granet]

• Fix Cant' exclude dependency-reduced-pom.xml #650

What's changed?

Exclude pom generated by org.apache.maven.plugins:maven-shade-plugin and com.outbrain.swinfra:ci-friendly-flatten-maven-plugin

What's your motivation?

Anything in particular you'd like reviewers to focus on?

Anyone you would like to review specifically?

Have you considered any alternatives or workarounds?

Any additional context

Checklist

• I've added unit tests to cover both positive and negative cases
• I've read and applied the recipe conventions and best practices
• I've used the IntelliJ IDEA auto-formatter on affected files

[timtebeek]

Nice find @philippe-granet ! I'd completely missed we already had special handling for some of these other alternative poms. Seems like the perfect place to add these exceptional cases as well. I've collapsed the conditionals you added to reduce duplication and ensure there's no surprises if the original pom files are missing. I trust that's no issue, but let me know if that was intentional on your side. Thanks again!