feat(releasechannel): add releasechannel ignore label

[n3rdc4ptn]

What this PR does / why we need it:
This pull request introduces improved filtering and error handling in the GetOCMComponentsWithVersions function in internal/ocm/ocm.go. The changes ensure that component versions with specific labels are ignored, and that versions without resources are logged and skipped, making the component selection process more robust.

Filtering and error handling improvements:

• Skips component versions with the label openmcp.cloud/ignore set to "true", preventing them from being included in the results.
• Logs an error and skips component versions that do not have any resources, ensuring only valid versions are processed.

Release note:

Releasechannel component can now have the `openmcp.cloud/ignore` label to be ignored by the control-plane-operator

[Copilot]

Pull Request Overview

This pull request adds improved filtering logic to the GetOCMComponentsWithVersions function to skip component versions based on labels and resource validation. The changes make the component selection process more robust by filtering out unwanted versions and handling edge cases.

• Adds filtering to skip component versions with the openmcp.cloud/ignore label set to "true"
• Implements validation to skip and log component versions that have no resources
• Introduces logging functionality with the log package import