Upgrade Xtext/Xtend to 2.36.0

[holgerfriedrich]

• Upgrade Xtext/Xtend from 2.35.0 to 2.36.0, see release notes: https://eclipse.dev/Xtext/releasenotes.html#/releasenotes/2024/08/25/version-2-36-0 https://eclipse.dev/Xtext/xtend/releasenotes.html#/releasenotes/2024/08/25/version-2-36-0
• Upgrade dependencies
  • Guava from 33.2.0 to 33.3.0
  • Classgraph from 4.8.172 to 4.8.174

Xtend 2.36 enables the new annotation XbaseGenerated by default and has a known issue with the code generator. eclipse/xtext#3182 which has been fixed after the release of 2.36. The second commit of this PR disables the annotation on 3 subdirectories - a workaround which can be removed once there is a new release.

Please do not squash during merge.