Migrate blob alert to use global_alert partial

Closes https://gitlab.com/gitlab-org/gitlab/-/issues/325366

app/views/projects/blob/_upload.html.haml

@@ -15,7 +15,10 @@
                 #{ dropzone_text.html_safe }
 
           %br
-          .dropzone-alerts.gl-alert.gl-alert-danger.gl-mb-5.data{ style: "display:none" }
+          = render 'shared/global_alert',
+            variant: :danger,
+            alert_class: 'dropzone-alerts gl-alert gl-alert-danger gl-mb-5 data gl-display-none',
+            dismissible: false
 
           = render 'shared/new_commit_form', placeholder: placeholder, ref: local_assigns[:ref]