Bump alpine to 3.20

[PromoFaux]

What does this PR aim to accomplish?:

Update Alpine base from 3.19 to 3.20

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5. I have squashed any insignificant commits. (git rebase)

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[yubiuser]

Do you want also upgrade here?
https://github.com/pi-hole/docker-pi-hole/blob/development-v6/test/Dockerfile

[PromoFaux]

FP'd

[PromoFaux]

Perhaps not as simple as that... one to investigate

[rdwebdesign]

I tried to build and test locally and I'm receiving this error:

33.54       creating build/temp.linux-armv7l-cpython-312/aiohttp
33.54       gcc -fno-strict-overflow -Wsign-compare -DNDEBUG -g -O3 -Wall -fPIC -I/usr/include/python3.12 -c aiohttp/_websocket.c -o build/temp.linux-armv7l-cpython-312/aiohttp/_websocket.o
33.54       error: command 'gcc' failed: No such file or directory
33.54       [end of output]
33.54
33.54   note: This error originates from a subprocess, and is likely not a problem with pip.
33.54   ERROR: Failed building wheel for aiohttp
33.55 Successfully built pytest-clarity
33.55 Failed to build aiohttp
33.95 ERROR: ERROR: Failed to build installable wheels for some pyproject.toml based projects (aiohttp)

[yubiuser]

Another approach would be to remove the sed and the same monkeypatch as used in core

https://github.com/pi-hole/pi-hole/blob/be5a8dc51a7b3e7ec3b40a9c815dee1c866ea2d4/test/conftest.py#L21-L35

[yubiuser]

@PromoFaux

See my commit and last comment. Which way do you prefer?

[PromoFaux]

Ah, Sorry - didn't see that you'd pushed a commit before your comment.

If I've understood it correctly, I think the monkeypatch is probably more resiliant as it is one less thing to have to update every time the python version updates?

[yubiuser]

I think I found a nice solution. My concern with the monkeypatch is that it is way harder to understand than a small sed command

[PromoFaux]

Ah yeah, that's good!