Update generated code to reflect latest schema

[bryanoltman]

This is the result of running the following from discoveryapis_generator:

dart bin/generate.dart package -i ../discovery-artifact-manager/discoveries -o ../generated/googleapis

In order to get this to run successfully, I need to make an update to generateAllLibraries in discoveryapis_generator/lib/discoveryapis_generator.dart to handle cases where a RestDescription could not be generated from a json file (I believe this only applied to index.json)

This also updates the version to 15.0.0. I'm not sure if there's a way to automate the changelog update, but I'd like to be sure that the discovery json files I used as input are up-to-date before proceeding (as per the readme, they are "updated by an internal mechanism and cannot be run locally at this time.")

[bryanoltman]

Update: changing this to a draft, as it seems like shared.dart is referencing types (BlogLocale, BlogPages, etc.) from files that depend on it.

[kevmoo]

there are scripts in the root tools directory for this.

[kevmoo]

I can take care of it. It's not well documented. Are there changes you really want soon?

[bryanoltman]

@kevmoo that would be awesome. I'll check out the scripts in the meantime. The motivation for doing this was to make the pubsub Message type's orderingKey available.

[bryanoltman]

Looked at the tool directory and ran ./tool/download.sh and ./tool/local_rebuild.sh, and that looks like it worked.

It seems to have updated almost every json file though, so I'm not sure if it makes sense to call them out all individually in the changelog (or if there's an automated way to make sense of ~150 changed json files)?

[bryanoltman]

Closing in favor of #688