* Add timeout to DNS query function calls
* Modify tests to account for new timeout variable
* Add change to CHANGELOG
* Add `dns.exception.Timeout` to exception handler
* Move changelog to 1.10.0
Part of #7886.
This PR conditionally installs `mock` in `certbot-dns-*/setup.py` based on setuptools version and python version, when possible. It then updates the tests to use `unittest.mock` when `mock` isn't available.
* Do not require mock in Python 3 in certbot-dns modules
* update changelog
* error when trying to build wheels with old setuptools
* add type: ignores
* Refactor tests out of module for certbot-dns-cloudflare
* Refactor tests out of module for certbot-dns-cloudxns
* Refactor tests out of module for certbot-dns-digitalocean
* Refactor tests out of module for certbot-dns-dnsimple
* Refactor tests out of module for certbot-dns-dnsmadeeasy
* Refactor tests out of module for certbot-dns-gehirn
* Refactor tests out of module for certbot-dns-google
* Refactor tests out of module for certbot-dns-linode
* Refactor tests out of module for certbot-dns-luadns
* Refactor tests out of module for certbot-dns-nsone
* Refactor tests out of module for certbot-dns-ovh
* Refactor tests out of module for certbot-dns-rfc2136
* Refactor tests out of module for certbot-dns-sakuracloud
* Refactor tests out of module for certbot-dns-route53
* Move certbot-dns-google testdata/ under tests/
* Use pytest for dns plugins
* Exclude pycache and .py[cod]
