Create helper for adding links on views

According to our documentation, we need to be careful when adding links as we should not split them otherwise text maybe be not translatable in some languages. With this in mind, we can end up with something like:

 = text_field_tag :environment_scope, '*', class: 'col-md-6 form-control disabled', placeholder: s_('ClusterIntegration|Environment scope'), disabled: true
 - environment_scope_url = 'https://docs.gitlab.com/ee/user/project/clusters/#base-domain'
 - environment_scope_start = '<a href="%{url}" target="_blank" rel="noopener noreferrer">'.html_safe % { url: environment_scope_url }
 .form-text.text-muted
   %code *
   = s_("ClusterIntegration| is the default environment scope for this cluster. This means that all jobs, regardless of their environment, will use this cluster. %{environment_scope_start}More information%{environment_scope_end}").html_safe % { environment_scope_start: environment_scope_start, environment_scope_end: '</a>'.html_safe }

Which works, but it makes HAML difficult to follow. It'd be nice to wrap all that in a helper:

 = text_field_tag :environment_scope, '*', class: 'col-md-6 form-control disabled', placeholder: s_('ClusterIntegration|Environment scope'), disabled: true
.form-text.text-muted
   %code *
   = s_("ClusterIntegration| is the default environment scope for this cluster. This means that all jobs, regardless of their environment, will use this cluster. #{link_i18n_helper(text: 'More Information', href: 'https://docs.gitlab.com/ee/topics/autodevops/')} }