Fix conversion to ros2, because of rosbags version change

[mehermvr]

Trying to convert the data to ros2 throws an error seemingly because of rosbags version change from 0.9.x to 0.10.x. The change is pretty simple which I suggest here, or the alternative can be to just pin the version in pyproject.toml.

For example, running (with main commit b422314)

vbr convert ros2 campus_train0 ros2_campus_train0

throws the error

File ".../vbr-devkit/python/vbr_devkit/tools/run.py", line 84, in convert
    rosconvert.convert(item, output_dir / item.stem)
TypeError: convert() missing 9 required positional arguments: 'dst_version', 'compress', 'compress_mode', 'default_typestore', 'typestore', 'exclude_topics', 'include_topics', 'exclude_msgtypes', and 'include_msgtypes'

I suggest two changes:

• I kept the defaults for all the additional arguments to rosconvert.convert().
• And because rosbags can handle split ros1 bag files, I changed the if-else conditional to allow passing a list of bags to convert() instead of converting each bag individually.

[EmanueleGiacomini]

Thanks for spotting this issue 🥇