Restore original makefiles and not use buildx

[DoumanAsh]

I didn't notice when from buildx came originally but it seems @zs-dima introduced it for regular x86 build, even though it didn't work properly in CI.
So I think it is good to restore it back as it was since @zs-dima introduced new workflow for arm
I'm not sure though why docker buildx doesn't work properly, but I'm unfortunately on windows so I do not have ability to test it locally

[DoumanAsh]

Github action to build from tag
https://github.com/PlugFox/docker_flutter/actions/runs/4716354293/jobs/8364004052

[zs-dima]

@DoumanAsh could I kindly ask you to describe obstacles you have with the buildx ?

[DoumanAsh]

@zs-dima Once you setup buildx it fails:
https://github.com/PlugFox/docker_flutter/actions/runs/4716295768/jobs/8363893795

[linux/arm/v7 build 2/6] RUN set -eux; mkdir -p /usr/lib /tmp/glibc /var/tmp/.pub_cache && apk --no-cache add bash curl git ca-certificates wget unzip && rm -rf /var/lib/apt/lists/* /var/cache/apk/*:
#0 0.102 exec /bin/sh: exec format error

I'm not sure why though, and I don't have ability to figure it out.
So it would be better to restore github action to work with x86 at least instead of having it broken due to buildx

If you know how to fix it please let me know.
I rely on these images and would like it to be always working for at least x86

[zs-dima]

@DoumanAsh ARM is not supposed by GitHub currently out of the box, let's disable ARM for now.

[DoumanAsh]

@zs-dima You can try if you can, aarch64 doesn't work itself too
https://github.com/PlugFox/docker_flutter/actions/runs/4717317043/jobs/8365812277
If we're just building x86, there is no need for buildx

[zs-dima]

@DoumanAsh even simpler - just remove ARM option from the buildx configuration

[zs-dima]

@DoumanAsh
Blocker issue to build for ARM: flutter/flutter#73260
Some more related issues:
dart-lang/sdk#51642
actions/runner-images#5631

• upvotes are welcome

[DoumanAsh]

If we remove all arm* variants, there is no point in using buildx
once they fix it, you can add it to this build configuration

[zs-dima]

@DoumanAsh it is point to use buildx as you could back arm easily after this issue is closed, although I do not mind to remove buildx for now.
Any way buildx doesn't introduce any issue.

[DoumanAsh]

Please do not make changes without making sure it would work next time.
I know @PlugFox doesn't have time to check every PR, so I would prefer everyone with write access to this repo to be careful when they break something
Using buildx just because you prefer it for no gain is not something worth breaking CI over