Unexport container commands

This patch deprecates exported container commands and moves the
implementation details to an unexported function.

Commands that are affected include:
- container.NewRunCommand
- container.NewExecCommand
- container.NewPsCommand
- container.NewContainerCommand
- container.NewAttachCommand
- container.NewCommitCommand
- container.NewCopyCommand
- container.NewCreateCommand
- container.NewDiffCommand
- container.NewExportCommand
- container.NewKillCommand
- container.NewLogsCommand
- container.NewPauseCommand
- container.NewPortCommand
- container.NewRenameCommand
- container.NewRestartCommand
- container.NewRmCommand
- container.NewStartCommand
- container.NewStatsCommand
- container.NewStopCommand
- container.NewTopCommand
- container.NewUnpauseCommand
- container.NewUpdateCommand
- container.NewWaitCommand
- container.NewPruneCommand

Signed-off-by: Alano Terblanche <18033717+Benehiko@users.noreply.github.com>

cli/command/container/export_test.go

@@ -19,7 +19,7 @@ func TestContainerExportOutputToFile(t *testing.T) {
 			return io.NopCloser(strings.NewReader("bar")), nil
 		},
 	})
-	cmd := NewExportCommand(cli)
+	cmd := newExportCommand(cli)
 	cmd.SetOut(io.Discard)
 	cmd.SetArgs([]string{"-o", dir.Join("foo"), "container"})
 	assert.NilError(t, cmd.Execute())
@@ -37,7 +37,7 @@ func TestContainerExportOutputToIrregularFile(t *testing.T) {
 			return io.NopCloser(strings.NewReader("foo")), nil
 		},
 	})
-	cmd := NewExportCommand(cli)
+	cmd := newExportCommand(cli)
 	cmd.SetOut(io.Discard)
 	cmd.SetErr(io.Discard)
 	cmd.SetArgs([]string{"-o", "/dev/random", "container"})