Add sysroot tag parser test

The sysroot tag parser was not tested and a regression occured
To catch future regressions make use for ade info and check
that the expected sysroot info can be read during tests.
Add support for --path to the ade info subcommand parser work
in temporary test directory.

Apertis: https://phabricator.apertis.org/T3777



Signed-off-by: Frédéric Dalleau <frederic.dalleau@collabora.com>
Reviewed-by: Emanuele Aina <emanuele.aina@collabora.com>
Differential Revision: https://phabricator.apertis.org/D6390