feat: add func to parse image references #172
                
     Merged
            
            
          
  Add this suggestion to a batch that can be applied as a single commit.
  This suggestion is invalid because no changes were made to the code.
  Suggestions cannot be applied while the pull request is closed.
  Suggestions cannot be applied while viewing a subset of changes.
  Only one suggestion per line can be applied in a batch.
  Add this suggestion to a batch that can be applied as a single commit.
  Applying suggestions on deleted lines is not supported.
  You must change the existing code in this line in order to create a valid suggestion.
  Outdated suggestions cannot be applied.
  This suggestion has been applied or marked resolved.
  Suggestions cannot be applied from pending reviews.
  Suggestions cannot be applied on multi-line comments.
  Suggestions cannot be applied while the pull request is queued to merge.
  Suggestion cannot be applied right now. Please check back later.
  
    
  
    
What this PR does / why we need it:
This PR moves the function
func ParseImageVersionAndTag(image string) (imageName string, tag string, digest string, err error)to this controller-utils repository. The function parses a container image string and returns the image name, tag, and digest.Initially, the function was implemented here: https://github.com/openmcp-project/bootstrapper/blob/aa787b6120a52420c0d2c0efb3b2092860dd3f6c/internal/util/image.go#L15
Which issue(s) this PR fixes:
Related to openmcp-project/service-provider-crossplane#46 (comment)
Special notes for your reviewer:
NONE
Release note: