feat: don't preserve extra container repository path from origin

[tompizmor]

Summary

This PR upgrades the distribution-tooling-for-helm library to version 0.7.0 and implements changes to better handle container repository structure and URL resolution.

Changes

Dependency Updates

• Upgraded distribution-tooling-for-helm from v0.6.1 to v0.7.0 to leverage latest features and fixes

Container URL Resolution Enhancement

• Modified container URL logic: When no explicit containers URL is specified, the system now appends /containers to the charts URL instead of using the same path
• This prevents collisions between charts and containers when they would otherwise be stored at the same location
• Example: If charts URL is http://127.0.0.1:5000/library-replicated/charts/photon-5, containers will now use http://127.0.0.1:5000/library-replicated/charts/photon-5/containers

Image Repository Handling

• Added WithPreserveRepository(false) option to both chart and container unwrapping operations
• This ensures consistent behavior in how image repositories are handled during the unwrapping process

Testing

• Added comprehensive unit tests (common_test.go) covering:
  • Container URL resolution when no explicit containers URL is provided
  • Container URL resolution when explicit containers URL is specified
  • Proper URL formatting and scheme handling

Test Plan

• Unit tests pass for container URL resolution logic
• Charts and containers are properly separated when using default URL resolution
• Image repository preservation behavior is consistent across chart and container operations