What type of PR is this?

/kind documentation

What this PR does / why we need it:

This PR increases the documentation of internal/webhooks.

Special notes for your reviewer:

Prompt:

Improve the inline documentation for for all golang files under this directory/package. Here are the rules to follow:

• Use concise idiomatic go documentation principles.
• Ensure correctness.
• Add some minimal inline documentation above complex code blocks when to explain the intent of the code.
• Don't document code that is clearly self documenting.
• Blocks of code should only have a comment describing them if it is practical and valuable.
• Don't change the code or variable names.
• All functions to should have concise accurate documentation with the exception of command "main" functions which are obviously entry points.
• Document field structs but don't duplicate the field documentation above.
• Avoid duplicate documentation, just pick the most appropriate place.
• Large or complex blocks of code that aren't self documenting should be documented.
• Avoid re-writing any existing documentation unless it's incomplete, or incorrect

Example of documentation that isn't useful and should be avoided:

// It uses JSON format at INFO level for structured logging.
var (
log = logger.MustNewLogger(false, configv1alpha1.InfoLevel, configv1alpha1.LogFormatJSON).WithName("grove-initc")
)```. 

Examples of documentation that doesn't add value: 
```  // Parse the replica count as an integer
replicas, err := strconv.Atoi(nameAndMinAvailable[1])
if err != nil {
 return nil, groveerr.WrapError(err, errCodeInvalidInput, operationParseFlag, "failed to convert replicas to int")
}

  // Store the PodClique name and its minimum available replicas
  podCliqueDependencies[strings.TrimSpace(nameAndMinAvailable[0])] = replicas

// Initialize the configuration with empty PodClique list
 config := CLIOptions{
  podCliques: make([]string, 0),
 }

 // Register all command line flags
 config.RegisterFlags(pflag.CommandLine)
 // Parse the command line arguments
 pflag.Parse()

 // Get the in-cluster REST configuration
 restConfig, err := rest.InClusterConfig()

// Get the pod informer from the factory
typedInformer := factory.Core().V1().Pods().Informer()

Systematically check every golang file under this directory is documented as per the instructions above.

Does this PR introduce a API change?

None