Use separate actions to select/deselect investments

This is consistent to what we usually do. Also, we're applying the same
criteria mentioned in commit 72704d776:

> We're also making these actions idempotent, so sending many requests
> to the same action will get the same result, which wasn't the case
> with the `toggle` action. Although it's a low probability case, the
> `toggle` action could result in [selecting an investment] when trying
> to [deselect] it if someone else has [deselected it] it between the
> time the page loaded and the time the admin clicked on the
> "[Selected]" button.

app/components/admin/budget_investments/toggle_selection_component.html.erb

@@ -1,4 +1,4 @@
-<% if can?(:toggle_selection, investment) %>
+<% if can?(action, investment) %>
   <%= render Admin::ToggleSwitchComponent.new(action, investment, pressed: selected?, **options) %>
 <% elsif selected? %>
   <%= selected_text %>

app/components/admin/budget_investments/toggle_selection_component.rb

@@ -14,20 +14,26 @@ class Admin::BudgetInvestments::ToggleSelectionComponent < ApplicationComponent
     end
 
     def action
-      :toggle_selection
+      if selected?
+        :deselect
+      else
+        :select
+      end
     end
 
     def path
-      toggle_selection_admin_budget_budget_investment_path(
-        investment.budget,
-        investment,
+      url_for({
+        controller: "admin/budget_investments",
+        action: action,
+        budget_id: investment.budget,
+        id: investment,
         filter: params[:filter],
         sort_by: params[:sort_by],
         min_total_supports: params[:min_total_supports],
         max_total_supports: params[:max_total_supports],
         advanced_filters: params[:advanced_filters],
         page: params[:page]
-      )
+      })
     end
 
     def options