How to add a board to an on-target Zephyr test suite?

[bryceschober]

I am curious what it would take to add a standard manufacturer's development board to those supported and targeted by Zephyr CI automated testing, as well as in specific tests/drivers/* suites. The board in question is the nucleo_h563zi, and I'd like it to be added to the spi_loopback test suite, but I'm not sure if hardware would have to be donated, or a PR simply submitted with its addition. Maybe I'm missing some other detail of how the Zephyr CI target hardware testing works, but I didn't easily find documentation of those details.

[JarmouniA]

@erwango