Update saml response alert

What does this MR do and why?

Describe in detail what your merge request does and why.

Update saml response alert

• use shared component

Changelog: other

EE: true

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Before	After

How to set up and validate locally

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1. Apply this patch

diff --git a/app/views/dashboard/_projects_head.html.haml b/app/views/dashboard/_projects_head.html.haml
index b94b14bf6bd..83139f390a9 100644
--- a/app/views/dashboard/_projects_head.html.haml
+++ b/app/views/dashboard/_projects_head.html.haml
@@ -4,6 +4,10 @@
 = content_for :flash_message do
   = render 'shared/project_limit'
 
+= render 'shared/global_alert',
+  variant: :success do
+  .gl-alert-body
+    = s_('GroupSAML|Valid SAML Response')
 .page-title-holder.d-flex.align-items-center
   %h1.page-title= _('Projects')

2. Navigate to projects page

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• I have evaluated the MR acceptance checklist for this MR.

Related to #354596 (closed)