Show UI warning to user when they need provider data but have not setup Synth yet (#1926)

* Simplify provider concerns

* Update tests

* Add UI warning for missing Synth key if family requires external data

app/models/security.rb

@@ -1,5 +1,5 @@
 class Security < ApplicationRecord
-  include Providable
+  include Provided
 
   before_save :upcase_ticker
 
@@ -9,21 +9,6 @@ class Security < ApplicationRecord
   validates :ticker, presence: true
   validates :ticker, uniqueness: { scope: :exchange_operating_mic, case_sensitive: false }
 
-  class << self
-    def provider
-      security_prices_provider
-    end
-
-    def search(query)
-      security_prices_provider.search_securities(
-        query: query[:search],
-        dataset: "limited",
-        country_code: query[:country],
-        exchange_operating_mic: query[:exchange_operating_mic]
-      ).securities.map { |attrs| new(**attrs) }
-    end
-  end
-
   def current_price
     @current_price ||= Security::Price.find_price(security: self, date: Date.current)
     return nil if @current_price.nil?