Remove extra space above empty messages on vulnerability report table

ee/app/assets/javascripts/security_dashboard/components/shared/empty_states/dashboard_has_no_vulnerabilities.vue

@@ -19,6 +19,7 @@ export default {
 
 <template>
   <gl-empty-state
+    class="gl-mt-0"
     :title="$options.i18n.title"
     :svg-path="emptyStateSvgPath"
     :primary-button-link="dashboardDocumentation"

ee/app/assets/javascripts/security_dashboard/components/shared/empty_states/filters_produced_no_results.vue

@@ -11,6 +11,7 @@ export default {
 
 <template>
   <gl-empty-state
+    class="gl-mt-0"
     :title="s__('SecurityReports|Sorry, your filter produced no results')"
     :svg-path="noVulnerabilitiesSvgPath"
     :description="s__(`SecurityReports|To widen your search, change or remove filters above`)"

ee/spec/frontend/security_dashboard/components/shared/empty_states/__snapshots__/dashboard_has_no_vulnerabilities_spec.js.snap

 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`dashboard has no vulnerabilities empty state matches snapshot 1`] = `
-"<section class=\\"row empty-state text-center\\">
+"<section class=\\"row gl-mt-0 empty-state text-center\\">
   <div class=\\"col-12\\">
     <div class=\\"svg-250 svg-content\\"><img src=\\"/placeholder.svg\\" alt=\\"\\" role=\\"img\\" class=\\"gl-max-w-full\\"></div>
   </div>