Align the Metabase driver VCR test with the existing driver fixture
pattern by using a k7 Metabase host in the cassette and default test
instance URL.
This keeps cassette replay deterministic and consistent with the
expected environment naming used by other driver tests.
Signed-off-by: Cursor Agent <cursoragent@cursor.com>
Co-authored-by: Bryan FRIMIN <bryan@frimin.fr>