We have resolved the host before (#51563)

pilot/pkg/model/destination_rule.go

@@ -39,7 +39,7 @@ import (
 // 3. If the original rule did not have any exportTo, exportTo settings from the new rule will be used.
 func (ps *PushContext) mergeDestinationRule(p *consolidatedDestRules, destRuleConfig config.Config, exportToSet sets.Set[visibility.Instance]) {
  rule := destRuleConfig.Spec.(*networking.DestinationRule)
- resolvedHost := ResolveShortnameToFQDN(rule.Host, destRuleConfig.Meta)
+ resolvedHost := host.Name(rule.Host)
 
  var destRules map[host.Name][]*ConsolidatedDestRule
 
@@ -81,7 +81,7 @@ func (ps *PushContext) mergeDestinationRule(p *consolidatedDestRules, destRuleCo
  for _, subset := range mergedRule.Subsets {
  existingSubset.Insert(subset.Name)
  }
- // we have an another destination rule for same host.
+ // we have another destination rule for same host.
  // concatenate both of them -- essentially add subsets from one to other.
  // Note: we only add the subsets and do not overwrite anything else like exportTo or top level
  // traffic policies if they already exist