misc. updates

[meeg]

• a workaround for a PYNQ bug affecting PYNQ 3.0.x (see pynq.Overlay() always uses cached .hwh information Xilinx/PYNQ#1409, https://github.com/openquantumhardware/qick/wiki/clearing-cached-PYNQ-metadata) - this would cause strange problems if you tried to load a new firmware file in the same file path as the previously loaded firmware
• some under-the-hood changes to the QICK box RF daughtercard code, to allow for selecting a filter step directly instead of requesting a nominal cutoff frequency
• some under-the-hood changes for the RF-DAC interface, to eventually allow getting the full output power from generators with mixers (i.e. interpolated and mix-mux)
• add "board_utils" code to read/control the board power supplies and set them appropriately for the DAC power setting configured in the firmware - in particular, some 216 firmwares are configured for 20 mA and 4x2 firmwares are configured for VOP, which do not match the default board power settings
• update tprocv1 projects, fixing Synthesis error in axis_signal_gen_v6 while building qick_tprocv1_216_standard #346 and tProc-v1 projects no longer build on main: bd tcl references removed IP axis_buffer_ddr_v1:1.0 #427 (and consolidating clock domains+CDCs to fix Start time of pulses across multiple DACs misaligned #277)
• from QICK-DAWG/@pabhakt, fix some logic bugs in the edge-counting mode of the avg_buffer
• add firmware projects for RFSoC2x4