This creates a framework similar to the old lang.sh from functional.
Some notable changes:
- instead of having a .flags file, a test.toml can declare flags
- additionally the test.toml can also declare extra files and multiple
runners for the given input file.
- there won't be any old tests hanging around anymore which weren't
deleted properly in the installation
- all files for a single test are defined decleratively and there won't
be any residues
Tests can be placed within the functional2/lang folder
most migrations should be rather clean
Implements: #825
Change-Id: I5f9149903ec5b078008969a4ae77305417c11475
Commentator2.0
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