0.73.3 release Bug fixes: - devices: qemu: specify only drive - fix: fix black stylecheck - devices: qemu: allow arch customisation - devices: qemu: arm64: arch_customization: cpu.lpa2 - devices: qemu: armv7: allow subclass reduce memory - test: integration: drop sh4 from being tested - unittest: increase unit test coverage - Revert "test: integration: drop sh4 from being tested"