[master] Drop Python 3.7 support.

[s0undt3ch]

What does this PR do?

See title.

[s0undt3ch]

Same cloud test failures as seen on the master branch

https://jenkins.saltproject.io/job/pr-centosstream-9-x86_64-py3-cloud-pytest/job/master/409

[Ch3LL]

I think it would be relevant to add a changelog and a note to the release notes that python 3.7 is no longer supported in 3007.0. I'm okay if you want to do this in a follow up PR as well.

[s0undt3ch]

I think it would be relevant to add a changelog and a note to the release notes that python 3.7 is no longer supported in 3007.0. I'm okay if you want to do this in a follow up PR as well.

Since this is already passing and has 3 review, yeah, I'll submit it separately.

[s0undt3ch]

I think it would be relevant to add a changelog and a note to the release notes that python 3.7 is no longer supported in 3007.0. I'm okay if you want to do this in a follow up PR as well.

Since this is already passing and has 3 review, yeah, I'll submit it separately.

Wait, only 2, not 3. But a separate PR will save build time

[dmurphy18]

does this line in noxfile.py

_PYTHON_VERSIONS = ("3", "3.5", "3.6", "3.7", "3.8", "3.9", "3.10")

need to change

[s0undt3ch]

@dmurphy18 will submit the issue you flagged when I also submit the changelog.

Merging.

[s0undt3ch]

#64424