Feature/38518 Add builder info

[kwojcicki]

PR Re-opened from #1659

Signed-off-by: Krystian Wojcicki kwojcicki@sympatico.ca

Client part of moby/moby#38518

- What I did
Added the builder version in the docker info command

- How I did it
reading the response from the server and printing out the corresponding version
also updated the version of moby/moby being used to get the new struct information.

- How to verify it
typing docker info/the tests

- Description for the changelog
Docker info prints the default builder

- A picture of a cute animal (not mandatory but encouraged)

[GordonTheTurtle]

Please sign your commits following these rules:
https://github.com/moby/moby/blob/master/CONTRIBUTING.md#sign-your-work
The easiest way to do this is to amend the last commit:

$ git clone -b "feature/38518_builder_info" git@github.com:kwojcicki/cli.git somewhere
$ cd somewhere
$ git rebase -i HEAD~842354510800
editor opens
change each 'pick' to 'edit'
save the file and quit
$ git commit --amend -s --no-edit
$ git rebase --continue # and repeat the amend for each commit
$ git push -f

Amending updates the existing PR. You DO NOT need to open a new one.

[thaJeztah]

Looks like this needs a rebase now, because another PR brought in the "moby" bump.

There's still some debate about the API changes; if we want to include just the version or if we need to include more information about the builder in future (in which case, we may want to change the API response to use a "struct" for builder).

I was also thinking what this info would be used for; including (e.g.) BuildKit as a component in the /version output? (similar to moby/moby#37974)

[kwojcicki]

@thaJeztah would you happen to know the correct way to update the golden files? I had to hack at the makefile to set the flag correctly? And also will try rebasing.

[thaJeztah]

hm, good one, I think I ran it manually last time 🤔

but, might want to join the discussion on moby/moby#38688

[thaJeztah]

closing per the discussion in moby/moby#38688 (comment)

but thanks so much!