Add device-dict mode runtime support

[bhcopeland]

tuxrun: __main__: Add device-dict mode runtime support

When --device-dict is used: use host network, skip HTTP service, bind
device control binaries, bind dispatcher download dir for NFS/TFTP.
Pass device_dict to tuxlava.

[roxell]

The commit message for this commit mentions dispatcher_ip.yaml.jinja2, but it should be dispatcher.yaml.jinaj2

[roxell]

In the commit message we can remove the extra blank line before your Signed-off-by.
Instead of our own bash-completion, can't we use argcomplete?

diff --git a/tuxrun/argparse.py b/tuxrun/argparse.py
index fc7375472173..0d4dab64b5e7 100644
--- a/tuxrun/argparse.py
+++ b/tuxrun/argparse.py
@@ -5,6 +5,7 @@
 #
 # SPDX-License-Identifier: MIT
 
+import argcomplete
 import argparse
 import sys
 from pathlib import Path
@@ -17,6 +18,18 @@ from tuxlava.devices import Device  # type: ignore
 from tuxlava.tests import Test  # type: ignore
 
 
+##############
+# Completers #
+##############
+def device_completer(**kwargs):
+    devices = [d.name for d in Device.list(virtual_device=True)]
+    return sorted(set(devices))
+
+
+def test_completer(**kwargs):
+    return Test.list(virtual_device=True)
+
+
 ###########
 # Helpers #
 ###########
@@ -327,12 +340,13 @@ def setup_parser() -> argparse.ArgumentParser:
     )
 
     group = parser.add_argument_group("run options")
-    group.add_argument(
+    device_arg = group.add_argument(
         "--device",
         default=None,
         metavar="NAME",
         help="Device type",
     )
+    device_arg.completer = device_completer
     group.add_argument(
         "--device-dict",
         default=None,

[roxell]

The commit messages mentions /srv/sftp do you mean sftp or tftp?