Mark nerdctl builder debug as incompatible with Docker

[AkihiroSuda]

Close #3652

The command line syntax is different across nerdctl builder debug and docker buildx debug (w/ BUILDX_EXPERIMENTAL=1)

[AkihiroSuda]

        Command:  /usr/bin/docker builder debug /tmp/TestBuilderDebug3887067063/001
        ExitCode: 1
        Error:    exit status 1
        Stdout:   
        Stderr:   ERROR: unknown command "/tmp/TestBuilderDebug3887067063/001" for "docker buildx debug"

[AkihiroSuda]

cc @ktock Was the CLI convention changed in buildx?

[ktock]

docker buildx debug and nerdctl builder debug have different syntax each other and the compatibility isn't guaranteed yet.

[ktock]

FAIL cmd/nerdctl/container.TestCreate/logs (0.02s)

Error on CI seems unrelated to the chanage. Rerunning it.