Prepare 1.7.0

[EmilienM]

Update CHANGELOG and update the user agent.

[coveralls]

coverage: 77.421%. remained the same when pulling 4f4a056 on EmilienM:release_1.7.0 into d462f04 on gophercloud:v1.

[pierreprinetti]

I wanted to paste a list of the incompatible changes listed by go-apidiff, so that we could check that all changes are in tests.

However, I found out that go-apidiff actually errored: https://github.com/gophercloud/gophercloud/actions/runs/6278222927/job/17051513912?pr=2789

[mandre]

I wanted to paste a list of the incompatible changes listed by go-apidiff, so that we could check that all changes are in tests.

However, I found out that go-apidiff actually errored: https://github.com/gophercloud/gophercloud/actions/runs/6278222927/job/17051513912?pr=2789

You actually have to look at the very end to see why it categorizes it as breaking change:

github.com/gophercloud/gophercloud
  Incompatible changes:
  - DefaultUserAgent: value changed from "gophercloud/v1.6.0" to "gophercloud/v1.7.0"'

Regarding the go-apidiff failure with the cache, I believe it would be fixed with joelanford/go-apidiff@0511785 and we're just waiting for a new version.

[EmilienM]

Yeah I think this version is backward compatible. Let me know otherwise.