Restore ability to pass extra options to cache stores

[dgynn]

This PR restores the ability to pass options to the cache helper methods which will be passed on the cache store. This functionality worked in 4.x.

The cache helper methods are supposed to pass any extra options to the cache store. For example :expires_in would be a valid option if memcache was the cache store.

<%= cache 'example_of_cached_time', :expires_in => 1.minute do %>
  <p>Some content that will be cached for a minute starting at <%= Time.now %></p>
<% end %>

The change in commit da16745 inadvertently broke the ability to pass any options other than :skip_digest and :virtual_path when some methods were changed to use keyword arguments.

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