Add support for Docker network EnableIPv4 option with API 1.48

[Dramelac]

Adding support for EnableIPv4 for docker network with API 1.48 (source: https://docs.docker.com/reference/api/engine/version-history/#v148-api-changes)

Equivalent to the command option docker network create --ipv4

[Dramelac]

I've force pushed to comply with Signed-off-by commit message. Is everything ok with the PR ? I saw some errors with the workflows but I'm not sure it's related to my changes.

[Dramelac]

I updated the test, and I also updated the version of Docker to use in order to use the minimum API version for the new feature.
While I was at it, I took the opportunity to update the new syntax for .utcfromtimestamp(), which had been deprecated.

[Dramelac]

Is everything OK for you with this PR ?

(If a fix for dind-ssl tests is available, I can merge it in the PR)

[Dramelac]

Ok I've found a fix for the SSL tests. Everything should work now.
Let me know if you want me to create a dedicated PR for this fix.

[Dramelac]

Do you want me to split this PR to separate the new feature and the bug fixes (and the SSL test) or do you prefer merging this PR all-in-one ?