Add Killercoda examples：Use Karmada-search to experience multi-cloud search

[JadeFlute0127]

What would you like to be added:
Add Karmada-search usage examples with killercoda, including use Karmada-search to experience multi-cloud search steps.

Tasks:

1. Implement propagate Deployment example.
   • Install karmada-search component in the Karmada control plane.
   • Cache Deployment resources across multiple clusters.
   • Use OpenSearch to graphically retrieve Kubernetes resources.

[JadeFlute0127]

/assign

[RainbowMango]

This comment is just for testing new Prowbot, regarding to karmada-io/karmada#4637

/kind feature

[RainbowMango]

/remove-kind feature
This comment is just for testing new Prowbot, regarding to karmada-io/community#157

[RainbowMango]

/kind feature