Bump to Buildah v1.40.0

Bumps to Buildah v1.40.0 and adds the `--inherits-labels` option to
build and farm build man pages.

Also turn off the inherit-labels option test for now as it seems to be
rathr unhappy.

Issue for inherit-labels test failure: https://github.com/containers/podman/issues/25938

Signed-off-by: tomsweeneyredhat <tsweeney@redhat.com>

vendor/github.com/moby/buildkit/frontend/dockerfile/parser/parser.go

@@ -220,7 +220,7 @@ func init() {
 // based on the command and command arguments. A Node is created from the
 // result of the dispatch.
 func newNodeFromLine(line string, d *directives, comments []string) (*Node, error) {
-	cmd, flags, args, err := splitCommand(line)
+	cmd, flags, args, err := splitCommand(line, d)
 	if err != nil {
 		return nil, err
 	}