[11.x] Add isTtySupported to Process facade

[Riley19280]

I would like to conditionally turn on TTY for a process if it is supported like so,

Process::when(\Symfony\Component\Process\Process::isTtySupported(), 
    fn (PendingProcess $process) => $process->tty()
)

but currently have to reach for the symfony process class to do so. This exposes the symfony Process::isTtySupported to the Process facade.