Refresh the page after clicking continue button

What does this MR do and why?

Refresh the page after clicking continue button

This change fixes an issue that prevents users from continuing with the right integration information.

When the page is preloaded the integration form is regenerated adding the fields preselected values.

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

Before	After

Recording showing that the page refreshes correctly and shows the underlying integration data after it gets updated in the background via an API call:

Screen_Recording_2024-03-08_at_14.50.35

How to set up and validate locally

1. Simulate a SAAS instance in local GDK

2. In rails console enable the required FF

   Feature.enable(:google_cloud_support_feature_flag)

3. Visit Settings > Integrations > Google Cloud IAM for any group or project

4. Click Guided setup

5. Execute the provided script or the following one if you don't have a GCP WIF setup (make sure to set GL_PAT to a token with api access and replace the <project ID>):

#!/bin/bash

set -eu
set -o pipefail

update_integration_data() {
  JSON_PAYLOAD=$(cat <<EOF
  {
    "workload_identity_federation_project_id": "dev-gcp-s3c-integrati-9abafed1",
    "workload_identity_federation_project_number": "604150606412",
    "workload_identity_pool_id": "gitlab-wlif",
    "workload_identity_pool_provider_id": "gitlab-wlif-oidc-provider"
  }
EOF
  )

  curl -X PUT https://gitlab.com/api/v4/projects/<project ID>/integrations/google-cloud-platform-workload-identity-federation  \
       --header "Content-Type: application/json" \
       --header "PRIVATE-TOKEN: $GL_PAT" \
       --data "$JSON_PAYLOAD"
}

update_integration_data

Related to #448831 (closed)