* repro: support regex/foreach-group to run at once
Fixes#4912Fixes#4886Fixes#4958
* Use `tree.isdir` rather than `os.path.isdir`
* Use glob rather than regex
* Update dvc/command/repro.py
* s/regex/glob
* disable glob on `collect_granular`
There's no need for a glob here
* add tests for `collect` and `collect_granular`