test/aoo-test: add the ODF 1.4 and 1.4 Extended save modes and the ODF 1.4 Part 4 formula cases

test: port thirteen more builders!; add error-kind baselines for ext and x13

test: add a pytest suite for an installed AOO 5 or later

The work on ODF 1.2, 1.3 and (now) 1.4 has resulted in a pretty nice pytest-based test suite; so include it!