Update & fix api doc urls

[sivakumar-kailasam]

Background

Until the end of 2.x series, we were using the versioned API doc URLs in the guides. This ensured that the API URLs always existed. But in the 3.x series, we started using the /release paths in the guides. Since there have been multiple reorgs of APIs in the 3.x series on both ember and ember-data, most of those URLs would lead nowhere.

Also in 3.11 ember-data restructured its packages which isn't completely represented in the API docs. Until it is sorted out, the release docs will point to the 3.10 ember-data docs instead of the 3.11 docs.

what's here

• Rewrote old URL patterns to API docs to the latest pattern (eg., http://www.emberjs.com/api, http://emberjs.com/api).
• Rewrote /release API URLs in the 3.x folders to use their corresponding versioned URLs instead.
• Rewrote /ember/release API URLs in the 3.x folder to use /ember/3.11 API URLs & /ember-data/release API URLs to use /ember-data/3.10 instead.

[jenweber]

#yolo