add workloadIdentitySettings ConfigMap for access to GKE fields

[markandersontrocme]

Description of your changes

In order to add external-dns support to platform-ref-upbound-spaces for GKE, we need access to some fields via ConfigMap:

• GKE Project

Fixes #

I have:

• Read and followed Upbound's contribution process.
• Run make reviewable to ensure this PR is ready for review.
• Added backport release-x.y labels to auto-backport this PR, as appropriate.

How has this code been tested

In the output of the E2E I saw this:

   apiVersion: v1
   items:
   - apiVersion: kubernetes.crossplane.io/v1alpha2
     kind: Object
     metadata:
       annotations:
         crossplane.io/composition-resource-name: workloadIdentitySettings
         crossplane.io/external-create-pending: "2024-05-27T18:18:46Z"
         crossplane.io/external-create-succeeded: "2024-05-27T18:18:46Z"
         crossplane.io/external-name: configuration-gcp-gke-workload-identity-settings
         upjet.upbound.io/test: "true"
       creationTimestamp: "2024-05-27T18:11:20Z"
       finalizers:
       - finalizer.managedresource.crossplane.io
       generateName: configuration-gcp-gke-
       generation: 3
       labels:
         crossplane.io/claim-name: ""
         crossplane.io/claim-namespace: ""
         crossplane.io/composite: configuration-gcp-gke
       name: configuration-gcp-gke-workload-identity-settings
       ownerReferences:
       - apiVersion: gcp.platform.upbound.io/v1alpha1
         blockOwnerDeletion: true
         controller: true
         kind: XGKE
         name: configuration-gcp-gke
         uid: 8942a8a4-afe1-4c4a-acd9-bd8fd0fc9dbe
       resourceVersion: "3056"
       uid: b5967619-e1f6-4dca-8c8a-62dd9dc63c84
     spec:
       deletionPolicy: Orphan
       forProvider:
         manifest:
           apiVersion: v1
           data:
             gkeProject: official-provider-testing
           kind: ConfigMap
           metadata:
             name: configuration-gcp-gke-workload-identity-settings
             namespace: default
       managementPolicies:
       - '*'
       providerConfigRef:
         name: configuration-gcp-gke
       readiness:
         policy: SuccessfulCreate
     status:
       atProvider:
         manifest:
           apiVersion: v1
           data:
             gkeProject: official-provider-testing
           kind: ConfigMap
           metadata:
             annotations:
               kubectl.kubernetes.io/last-applied-configuration: '***"apiVersion":"v1","data":***"gkeProject":"official-provider-testing"***,"kind":"ConfigMap","metadata":***"name":"configuration-gcp-gke-workload-identity-settings","namespace":"default"***'
             creationTimestamp: "2024-05-27T18:18:46Z"
             managedFields:
             - apiVersion: v1
               fieldsType: FieldsV1
               fieldsV1:
                 f:data:
                   .: ***
                   f:gkeProject: ***
                 f:metadata:
                   f:annotations:
                     .: ***
                     f:kubectl.kubernetes.io/last-applied-configuration: ***
               manager: crossplane-kubernetes-provider
               operation: Update
               time: "2024-05-27T18:18:46Z"
             name: configuration-gcp-gke-workload-identity-settings
             namespace: default
             resourceVersion: "2115"
             uid: 50e8a17f-852e-4f68-bbbb-9f72ed22eb95
       conditions:
       - lastTransitionTime: "2024-05-27T18:18:46Z"
         reason: ReconcileSuccess
         status: "True"
         type: Synced
       - lastTransitionTime: "2024-05-27T18:18:46Z"
         reason: Available
         status: "True"
         type: Ready

[haarchri]

/test-examples

[markandersontrocme]

/test-examples

[markandersontrocme]

/test-examples

[markandersontrocme]

/test-examples