add globbing support in makeReader and CreateDataSource

[m-fila]

BEGINRELEASENOTES

• POSIX glob patterns can be used in makeReader and CreateDataSource. Added standalone helper podio::utilities::expand_globto resolve globs.
• Added passing a list of files to get_reader

ENDRELEASENOTES

This is a proposition to make makeReader and CreateDataSource overloads a taking single filename also accept and expand a POSIX glob pattern.

The behaviour is:

• if input isn't a glob pattern it's forwarded without expansion (regardless it exists or not)
• if no matches are found then an exception is thrown
• if any other error (memory allocation) is reported then an exception is thrown
• if some expanded paths can't be read message with path name and corresponding error code is printed to cerr. The problematic paths are then skipped in the results, but the expansion overall isn't aborted.

Closes #686

• podio::makeReader
• podio::CreateDataFrame
  - [x] Python side - podio.get_reader
• Python side - podio.CreateDataFrame

[tmadlener]

Just for completeness bringing the conclusions from todays meeting here:

• podio::detail::expand_glob should become a publicly available utility (also available from python)
• makeReader(std::string) will keep the implicit globbing (via calling the aforementioned utility). Similar for the CreateDataFrame that takes only a single string. In both cases the versions that take a file list should not change.
• The python side should not have implicit globbing (i.e. the "hidden" glob that is currently present should be removed).
• The python interface should be able to take a list of input files though
• (As a bonus goal to be done in another PR, we should check and see if the c++ and python API can be harmonized a bit better).

[m-fila]

I think that should cover now all the points from the meeting except for harmonizing the Python bindings for readers