implemented headless service example for whereami

[theemadnes]

Description

This PR adds a set of K8s YAML for whereami, so when you use gRPC mode, the backend service can be configured as a headless service.

Tasks

• [ x] The contributing guide has been read and followed.
• [ x] The samples added / modified have been fully tested.
• Workflow files have been added / modified, if applicable.
• Region tags have been properly added, if new samples.
• [x ] Editable variables have been used, where applicable.
• [x ] All dependencies are set to up-to-date versions, as applicable.
• [ x] Merge this pull-request for me once it is approved.

[snippet-bot]

Here is the summary of changes.

You are about to add 6 region tags.

• quickstarts/whereami/k8s-grpc-clusterip-backend-overlay-example/cm-flag.yaml:15, tag gke_k8s_grpc_clusterip_backend_overlay_example_cm_flag_configmap_whereami_grpc_configmap
• quickstarts/whereami/k8s-grpc-clusterip-backend-overlay-example/kustomization.yaml:15, tag gke_k8s_grpc_clusterip_backend_overlay_example_kustomization
• quickstarts/whereami/k8s-grpc-clusterip-backend-overlay-example/service-type.yaml:16, tag gke_k8s_grpc_clusterip_backend_overlay_example_service_type_service_whereami_grpc
• quickstarts/whereami/k8s-grpc-headless-backend-overlay-example/cm-flag.yaml:16, tag gke_k8s_grpc_headless_backend_overlay_example_cm_flag_configmap_whereami_grpc_configmap
• quickstarts/whereami/k8s-grpc-headless-backend-overlay-example/kustomization.yaml:15, tag gke_k8s_grpc_headless_backend_overlay_example_kustomization
• quickstarts/whereami/k8s-grpc-headless-backend-overlay-example/service-type.yaml:16, tag gke_k8s_grpc_headless_backend_overlay_example_service_type_service_whereami_grpc

You are about to delete 2 region tags.

• quickstarts/whereami/k8s-grpc-backend-overlay-example/service-type.yaml:16, tag gke_k8s_grpc_backend_overlay_example_service_type_service_whereami_grpc
• quickstarts/whereami/k8s-grpc-backend-overlay-example/cm-flag.yaml:16, tag gke_k8s_grpc_backend_overlay_example_cm_flag_configmap_whereami_grpc_configmap

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[theemadnes]

#1833

[bourgeoisor]

@theemadnes the header check is complaining about these:

quickstarts/whereami/k8s-grpc-clusterip-backend-overlay-example/cm-flag.yaml should have a copyright year of 2025
quickstarts/whereami/k8s-grpc-clusterip-backend-overlay-example/kustomization.yaml is missing a valid license header.
quickstarts/whereami/k8s-grpc-headless-backend-overlay-example/kustomization.yaml is missing a valid license header.
quickstarts/whereami/k8s-grpc-headless-backend-overlay-example/service-type.yaml should have a copyright year of 2025

[theemadnes]

will fix this evening or this weekend

[theemadnes]

@bourgeoisor should be good to go