storage: Make partition resizing work with parted 3.3

On Raspberry Pi 3B+ image, it was observed that resizing partition fails during
initial setup. Due to this, Apache, SSH and Plinth become unavailable. This is
due newer version of parted 3.3 (Debian testing/unstable) which does not work
with ---pretend-input-tty option as previously expected of parted 3.2 (Debian
buster).

Fix the problem by sending answers to promoted questions via stdin instead of
via command line. This solution works on both versions of parted, i.e., 3.2 and
3.3.

Tests:

- On a freshly built Raspberry Pi 3B+ unstable image the problem is
  reproducible. Running expand partition fails repeatedly.

- Downgrade version of parted to 3.2 observe that the expanding operation runs
  fine. Upgrade to version parted 3.3 again.

- Apply the patch on the action script. Re-run expanding partition and observe
  that the problem is resolved. The version of parted is 3.3.

- Downgrade the version of parted to 3.2. Downsize the partition, re-run
  expanding partition.

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>

actions/storage

@@ -96,14 +96,15 @@ def _resize_partition(device, requested_partition, free_space):
     # https://debbugs.gnu.org/cgi/bugreport.cgi?bug=24215
     fallback_command = [
         'parted', '--align=optimal', device, '---pretend-input-tty', 'unit',
-        'B', 'resizepart', requested_partition['number'], 'yes',
-        str(free_space['end'])
+        'B', 'resizepart', requested_partition['number']
     ]
     try:
         subprocess.run(command, check=True)
     except subprocess.CalledProcessError:
         try:
-            subprocess.run(fallback_command, check=True)
+            input_text = 'yes\n' + str(free_space['end'])
+            subprocess.run(fallback_command, check=True,
+                           input=input_text.encode())
         except subprocess.CalledProcessError as exception:
             print('Error expanding partition:', exception, file=sys.stderr)
             sys.exit(5)