Crossplane providers cannot be installed

[cmoulliard]

Issue

Crossplane providers (helm, kubernetes) cannot be installed anymore using the script ./scripts/Crossplane.sh

apiVersion: pkg.crossplane.io/v1
kind: Provider
metadata:
  annotations:
    kubectl.kubernetes.io/last-applied-configuration: |
      {"apiVersion":"pkg.crossplane.io/v1","kind":"Provider","metadata":{"annotations":{},"name":"helm-provider"},"spec":{"controllerConfigRef":{"name":"debug-config"},"package":"crossplanecontrib/pr
ovider-helm:v0.18.1"}}
  creationTimestamp: "2024-05-02T10:47:26Z"
  generation: 1
  name: helm-provider
  resourceVersion: "1600"
  uid: ca3d2666-03c3-4960-b21c-c0c76fa83e25
spec:
  controllerConfigRef:
    name: debug-config
  ignoreCrossplaneConstraints: false
  package: crossplanecontrib/provider-helm:v0.18.1
  packagePullPolicy: IfNotPresent
  revisionActivationPolicy: Automatic
  revisionHistoryLimit: 1
  runtimeConfigRef:
    apiVersion: pkg.crossplane.io/v1beta1
    kind: DeploymentRuntimeConfig
    name: default
  skipDependencyResolution: false
status:
  conditions:
  - lastTransitionTime: "2024-05-02T10:48:25Z"
    message: 'cannot unpack package: failed to fetch package digest from remote: failed
      to fetch package descriptor with a GET request after a previous HEAD request
      failure: GET https://xpkg.upbound.io/service/token?scope=repository%3Acrossplanecontrib%2Fprovider-helm%3Apull&service=xpkg.upbound.io:
      unexpected status code 404 Not Found: GET https://xpkg.upbound.io/service/token?scope=repository%3Acrossplanecontrib%2Fprovider-helm%3Apull&service=xpkg.upbound.io:
      unexpected status code 404 Not Found'

Reason

The repository hosting the providers changes from crossplane/provider-kubernetes to xpkg.upbound.io/crossplane-contrib/provider-kubernetes

This issue impacts the PR: #465