Use SPDX license identifiers in package manifests

[kronk-bot]

[written by AI]

Summary

• replace ambiguous or non-standard package license text with the equivalent SPDX identifier
• leave the repository's licensing terms unchanged
• related to PickNikRobotics/moveit_pro#22271

Validation

• parsed every changed package.xml as XML
• validated package declarations against the repository's detected root license with the proposed moveit_pro_lint validator
• git diff --check

Changed files:

• package.xml