migrate attribute keys to ocm.software

[hilmarf]

Description

ocm --help | grep mandelsoft
  --cred :type=OCIRegistry --cred :hostname=ghcr.io --cred username=mandelsoft --cred password=xyz
  - «github.com/mandelsoft/logforward» [«logfwd»]: *logconfig* Logging config structure used for config forwarding
  - «github.com/mandelsoft/oci/cache» [«cache»]: *string*
  - «github.com/mandelsoft/ocm/compat» [«compat»]: *bool*
  - «github.com/mandelsoft/ocm/hasher»: *JSON*
  - «github.com/mandelsoft/ocm/keeplocalblob» [«keeplocalblob»]: *bool*
  - «github.com/mandelsoft/ocm/mapocirepo» [«mapocirepo»]: *bool|YAML*
  - «github.com/mandelsoft/ocm/ociuploadrepo» [«ociuploadrepo»]: *oci base repository ref*
  - «github.com/mandelsoft/ocm/plugindir» [«plugindir»]: *plugin directory*
  - «github.com/mandelsoft/ocm/rootcerts» [«rootcerts»]: *JSON*
  - «github.com/mandelsoft/ocm/signing»: *JSON*
  - «github.com/mandelsoft/tempblobcache» [«blobcache»]: *string* Foldername for temporary blob cache

Use ocm.software/ as prefix instead of github.com/mandelsoft/

The attribute names should make sense together with the configtypes.

Done Criteria

• Result matches final proposal: https://github.com/open-component-model/internal-processes/pull/15
• Code has been reviewed by other team members
• Internal technical Documentation created/updated
• New / changed code is documented
• Analysis of existing tests (Unit and Integration)
• Unit Tests created for new code or existing Unit Tests updated
• Integration Test Suite updated (includes deletion of existing unnecessary Integration Test and/or creation of new ones if required)
• Enduser Documentation updated (if applicable)
• Successful demonstration in Review