Combine similar routes and templates, delete unused TO form templates

templates/portfolios/task_orders/index.html

@@ -93,7 +93,7 @@
 
   {% call StickyCTA(text="Funding") %}
     <div class='portfolio-funding__header row'>
-      <a href="{{ url_for("task_orders.new", portfolio_id=portfolio.id) }}" class="usa-button">Start a new task order</a>
+      <a href="{{ url_for("task_orders.edit", portfolio_id=portfolio.id) }}" class="usa-button">Start a new task order</a>
     </div>
   {% endcall %}
 
@@ -125,7 +125,7 @@
     {{ EmptyState(
       'This portfolio doesn’t have any active or pending task orders.',
       action_label='Add a New Task Order',
-      action_href=url_for('task_orders.new', portfolio_id=portfolio.id),
+      action_href=url_for('task_orders.edit', portfolio_id=portfolio.id),
       icon='cloud',
     ) }}
   {% endif %}