When working on test cases for #827 and #734 the following issues
occurred
  1. There was no support to pass in `Data` for `stdin` (input pipe added
    + new argument for the data)
  2. Pipes were getting blocked during the `try process.run()` and
    `process.waitUntilExit()` (order of operations were fixed)
  3. We need the binary data for directly piping the `stdout` data to
    `stdin`, and converting the data to a `string`, returns `""` (added a
    new value to the tuple)

I opened a new PR here for this as I did not want to bloat the other PRs
with so many updates. At first I thought of creating a new function
named `runStdinStdout`, but that seemed redundant as it pretty much was
going to do the same thing as `run`.

## Testing
- [x] Tested locally
- [x] Added/updated tests
- [ ] Added/updated docs

---------

Co-authored-by: J Logan <john_logan@apple.com>

When working on test cases for apple#827 and apple#734 the following issues
occurred
  1. There was no support to pass in `Data` for `stdin` (input pipe added
    + new argument for the data)
  2. Pipes were getting blocked during the `try process.run()` and
    `process.waitUntilExit()` (order of operations were fixed)
  3. We need the binary data for directly piping the `stdout` data to
    `stdin`, and converting the data to a `string`, returns `""` (added a
    new value to the tuple)

I opened a new PR here for this as I did not want to bloat the other PRs
with so many updates. At first I thought of creating a new function
named `runStdinStdout`, but that seemed redundant as it pretty much was
going to do the same thing as `run`.

## Testing
- [x] Tested locally
- [x] Added/updated tests
- [ ] Added/updated docs

---------

Co-authored-by: J Logan <john_logan@apple.com>