Use probe-rs for CMSIS-DAP and JTAG

[adamgreig]

At least in principle it might make sense to port the new CMSIS-DAP probe code and JTAG code, state machine, etc to probe-rs, then use probe-rs as a dependency for ecpdap. If done right, this should allow using ST-link, J-Link, and FTDI probes as well as CMSIS-DAP probes.