Move assets and sample_data_resources, update snapshot

Author: DianaDerevyankina

src/plugins/dashboard/public/application/__snapshots__/dashboard_empty_screen.test.tsx.snap

@@ -50,8 +50,8 @@ export function DashboardEmptyScreen({
 }: DashboardEmptyScreenProps) {
   const IS_DARK_THEME = uiSettings.get('theme:darkMode');
   const emptyStateGraphicURL = IS_DARK_THEME
-    ? '/plugins/kibana/home/assets/welcome_graphic_dark_2x.png'
-    : '/plugins/kibana/home/assets/welcome_graphic_light_2x.png';
+    ? '/plugins/home/assets/welcome_graphic_dark_2x.png'
+    : '/plugins/home/assets/welcome_graphic_light_2x.png';
   const linkToVisualizeParagraph = (
     <p data-test-subj="linkToVisualizeParagraph">
       <EuiButton

src/plugins/dashboard/public/application/dashboard_empty_screen.tsx

@@ -42,7 +42,7 @@ interface Props {
 export function SampleDataCard({ urlBasePath, onDecline, onConfirm }: Props) {
   return (
     <EuiCard
-      image={`${urlBasePath}/plugins/kibana/home/assets/illustration_elastic_heart.png`}
+      image={`${urlBasePath}/plugins/home/assets/illustration_elastic_heart.png`}
       textAlign="left"
       title={<FormattedMessage id="home.letsStartTitle" defaultMessage="Let's get started" />}
       description={