Improve SDK archive page

[kwalrath]

This is an umbrella issue for requests for https://dart.dev/tools/sdk/archive:

• 'Dart SDK Archive' page issue site-shared#96: UI freezes
• dart-lang/site-shared#97: SDK Archive sorting is weird
• Download archive should use analytics #89: Download archive should use analytics
• Use sdk_builds package for archive page #75: Use sdk_builds package for archive page

/cc @johnpryan @domesticmouse

[kwalrath]

I added a couple of other bugs (very old) to the list.

[johnpryan]

Quick update: it looks like we will be able to use the sdk_builds package (#75) but either way there needs to be a fair number of network calls in order to display the correct version for pre-1.11.0-dev.0.0 since those are SVN revisions.

I'm going to start with a PR that updates to using sdk_builds (#75) and uses the sdk_buildspackage (dart-lang/site-shared#97) and leave analytics and performance issues for the next iteration

[johnpryan]

FWIW we do have the option of greatly improving the performance if we manually mapped the SVN revisions to version strings:

using the getVersionPaths() from package:sdk_builds is a single HTTP call but results in SVN versions mixed with the others:

package:sdk_builds could just provide a hard-coded Map from the SVN revision to the Dart version since that information won't change

[johnpryan]

I have a working prototype here that uses a dart 2 compatible branch of sdk_builds (kevmoo/sdk_builds.dart#1).

I'm currently running into an issue with the googleapis Storage class provided by sdk_builds and filed an issue here (google/googleapis.dart#73)

[kwalrath]

Is the prototype staged anywhere?

[johnpryan]

http://jpryan.me/dart_sdk_archive/

[johnpryan]

Since the only remaining issue is #89, I'm going to close this so we can just track that specific issue.