Add cloud providers illustrations

app/views/clusters/clusters/cloud_providers/_cloud_provider_button.html.haml

@@ -3,6 +3,6 @@
 - label = local_assigns.fetch(:label)
 
 = link_to clusterable.new_path(provider: provider), class: 'btn gl-button btn-outline flex-fill d-inline-flex flex-column mr-3 justify-content-center align-items-center' do
-  = image_tag logo_path, alt: label, class: 'gl-w-13 gl-h-13'
+  .svg-content= image_tag logo_path, alt: label, class: 'gl-w-13 gl-h-13'
   %span
     = label

app/views/clusters/clusters/cloud_providers/_cloud_provider_selector.html.haml

@@ -6,6 +6,6 @@
     = create_cluster_label
   .d-flex
     = render partial: 'clusters/clusters/cloud_providers/cloud_provider_button',
-      locals: { provider: 'gke', label: gke_label, logo_path: '' }
+      locals: { provider: 'eks', label: eks_label, logo_path: 'illustrations/logos/amazon_eks.svg' }
     = render partial: 'clusters/clusters/cloud_providers/cloud_provider_button',
-      locals: { provider: 'eks', label: eks_label, logo_path: '' }
+      locals: { provider: 'gke', label: gke_label, logo_path: 'illustrations/logos/google_gke.svg' }