adding hooks for google cloud & google api modules

[bayesfactor]

In my build, I found a runtime error unless I included these hook files before build.

[htgoebel]

This hook is for "google.api", but includes meta-data from "google-api-core". Thus should'nt this be a hook for e.g. "google.api.core"?

[htgoebel]

@bayesfactor Would you please answer the questions so we can proceed with this pull-request? Thanks.

[bayesfactor]

I admit I'm no expert, so I tested both ways.
with google-api-core, the project builds and runs.
with google.api.core, I get an error on build:
pkg_resources.DistributionNotFound: The 'google.api.core' distribution was not found and is required by the application.

[htgoebel]

@bayesfactor Sorry for not commint back on this for so long. I'd like to merge it. For this please

• submit a changelog entry so our users can learn about your change.

[bayesfactor]

I created the entry in the changelog: news/3251.bugfix.rst

I hope this is correct

[htgoebel]

@bayesfactor There is still only one file in the pull-request - no changelog entry. Also this needs to go into the "hooks" section, as the manual states.

[htgoebel]

@bayesfactor Pinging. The changelog entry is still missing. Please add one, so I can merge. Thanks.