fix: prevent double trailing slash

See merge request !1

This updates the action to use `docker/build-push-action` instead of `ilteoood/docker_buildx`
which fixes the build problem in testing.

This DEBUG was being generated on redirects which don't have a JSON
body and is irrelevant.

The upload routine no longer returns a url to download the object.

This fixes the problem by fetching it if necessary when we attempt to
Open the object.

For some reason the parent ID got out of date in the Object (exact
reason not known - but the fact that this was OK before suggests a
change in the provider).

However we know the parent ID as it is in the directory cache, so use
that instead.

This gives the error

> Update second step failed: Linkbox error 500: The file name needs to include a suffix, such as xxx.mp4

As linkbox can't have files starting with "." and we are trying to save a file called ".ignore".

The server side move had a combination of bugs
- Fichier changed the API disallowing a move to the same name
- Rclone was using the wrong object for some operations

The original problem was introduced here

bcdfad3c build: update logging statements to make json log work #6038

And this was fixed non-optimally here

f1a84d17 build: fix build after update

It fails to build on plan9, which is part of the rclone CI matrix, and
the PR fixing it upstream doesn't seem to be getting traction.

Stub it on our side, we can still remove this once it gets merged.

This was missing the fact rclone also supports listening on Unix Domain
Sockets.

Instead of the listening addresses specified above, rclone will listen to all
FDs passed by the service manager, if any (and ignore any arguments passed by
`--{{ .Prefix }}addr`.

This allows rclone to be a socket-activated service. It can be configured as described in
https://www.freedesktop.org/software/systemd/man/latest/systemd.socket.html

It's possible to test this interactively through `systemd-socket-activate`,
firing of a request in a second terminal:

```
❯ systemd-socket-activate -l 8088 -l 8089 --fdname=foo:bar -- ./rclone serve webdav :local:test/
Listening on [::]:8088 as 3.
Listening on [::]:8089 as 4.
Communication attempt on fd 3.
Execing ./rclone (./rclone serve webdav :local:test/)
2024/04/24 18:14:42 NOTICE: Local file system at /home/flokli/dev/flokli/rclone/test: WebDav Server started on [sd-listen:bar-0/ sd-listen:foo-0/]
```

This adds an import missed in

bcdfad3c build: update logging statements to make json log work #6038

This changes log statements from log to fs package, which is required for --use-json-log
to properly make log output in JSON format. The recently added custom linting rule,
handled by ruleguard via gocritic via golangci-lint, warns about these and suggests
the alternative. Fixing was therefore basically running "golangci-lint run --fix",
although some manual fixup of mainly imports are necessary following that.

With the enhancement in version v2.0.3 of ncw/swift library, we can now get Total and Free space info from remotes that support this feature (ex. Blomp storage)