podman: new option --preserve-fd

add a new option --preserve-fd that allows to specify a list of FDs to
pass down to the container.

It is similar to --preserve-fds but it allows to specify a list of FDs
instead of the maximum FD number to preserve.

--preserve-fd and --preserve-fds are mutually exclusive.

It requires crun since runc would complain if any fd below
--preserve-fds is not preserved.

Closes: https://github.com/containers/podman/issues/20844

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

pkg/domain/entities/pods.go

@@ -250,6 +250,7 @@ type ContainerCreateOptions struct {
 	PodIDFile          string
 	Personality        string
 	PreserveFDs        uint
+	PreserveFD         []uint
 	Privileged         bool
 	PublishAll         bool
 	Pull               string