A target created by pico_simple_hardware_headers_target should depend on hardware_claim_headers not hardware_claim

[ooxi]

A target created by pico_simple_hardware_headers_target should depend on hardware_claim_headers not hardware_claim.

The reason for this change request is hardware_claim adding claim.c to my sources, which I do not want (otherwise I would have depended on e.g. hardware_gpio not hardware_gpio_headers).

This is not an issue for hardware_structs since this target does not define sources.

[kilograham]

Part of #882

[kilograham]

merged into develop