[docs/sources/datasources] Replace docs/reference shortcode with ref URIs

[jdbaldry]

You can use ref URIs in admonitions (or any shortcodes) because they are inline and not subject to the issues noted in the admonition shortcode.

The ref URIs perform the same pattern matching as docs/reference but don't require the use of reference-style links and the destinations are ordinary (full) URLs that can include version substitution. Unlike docs/reference, the implementation doesn't use relref so you don't have to be careful with omitting trailing slashes and the links will follow redirects.

Documentation: https://grafana.com/docs/writers-toolkit/write/links/#link-from-source-content-thats-used-in-multiple-projects

To check the links, refer to the deploy preview in https://github.com/grafana/website/pull/19630.

Signed-off-by: Jack Baldry jack.baldry@grafana.com

[Eve832]

I didn't check every single link, but I checked a bunch with make docsand didn't find any duds; and I did scan the diff to make see if I saw any obvious formatting errors. So I think we're good to go