Allow urls to media to be the urls directly to the source, instead of redirect from Raytha

[apexdodge]

Currently, when a file is uploaded, either via the Attachments field type, or if uploaded within a long text / wysiwyg field, the url that is generated is always something like /raytha/media-items/objectkey/abc.

The good

• If storage moves to a new location, the urls will still work so long as the object keys remain the same.
• In theory, can easily require users to be logged in / have some authorization by adding [Authorize] attribute on the controller, etc.

The bad

• It adds request load on the server, for example, if you have a gallery list view with 25 images, that is 25 requests to the web server that need to be redirected (browser caching might reduce this but still).

Proposal:

We add an environment variable under storage that, if turned on, will output the URLs to directly to the source storage. It will default to off though.

[apexdodge]

Decided to change the implementation here, simplified it, but I'm quite happy with the decision for now. This is now a choice for outputting the URL to the file via liquid filter.

1) Added a new filter attachment_redirect_url liquid filter which outputs the URL of /raytha/media-items/objectkey/{{ Target.PublishedContent.attachment.Value }} which is the same behavior as the current existing filter raytha_attachment_url.

2) Added a new filter attachment_public_url which will output the direct url to the blob on the file storage provider. A requirement of this method is that your bucket or container needs to have anonymous public-read access on the objects because it will not generate a presigned url or SaS url.

3) raytha_attachment_url is now deprecated. Consumers should switch to attachment_redirect_url in their templates to preserve the same behavior. To be removed in v1.0.6.