--domain argument from run cannot be given in create-testplan

```
usage: feditest create-testplan [-h] [--testsdir TESTSDIR] [--nodedriversdir NODEDRIVERSDIR] [--name NAME] [--constellation CONSTELLATION] [--session SESSION] [--node NODE] [--filter-regex FILTER_REGEX] [--test TEST] [--out OUT]
```
vs.
```
usage: feditest run [-h] [--nodedriversdir NODEDRIVERSDIR] [--testsdir TESTSDIR] [--domain DOMAIN] [--who] [-i | -ie] [--name NAME] [--testplan TESTPLAN] [--constellation CONSTELLATION] [--session SESSION] [--node NODE]
[--filter-regex FILTER_REGEX] [--test TEST] [--tap [TAP]] [--html HTML] [--template-path TEMPLATE_PATH] [--json [JSON]] [--summary [SUMMARY]]
```

Compare the other arguments, too.

Start by locating the command definitions for `feditest create-testplan` and `feditest run`, then compare their argument handling and the usage output shown in the issue. Add the missing supported arguments where appropriate and verify that the create-testplan help and invocation behavior match the intended run options.

Written by the indexing model from the issue text.