The remote client (podman --remote) was incorrectly throwing an error
when --detach-keys="" was specified for attach, run, or start commands.
According to documentation and the v1.7.0 release notes, specifying an
empty string should disable detaching, not cause an error.
Fixes: #27414
Signed-off-by: shiavm006 <shivammittal42006@gmail.com>