test/py: add TPMv2.x test suite

Add tests for the TPMv2.x commands.
These commands may run both on a physical TPM and with the sandbox
driver.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>