sysview: bench-run the WCH post-mortem dump recipe on ch32v307v_r1_1v0

The recipe was committed syntax-checked only. Run as written (cdc_msc, since
neither WCH family builds the FreeRTOS examples): halt-only attach, 4096-byte
ring dumped and WrOff-split, decoded to a 0.16 s window with overflow 0,
ISR 85 n=68 p50 5.0 us, tud_task n=69 p50 8.0 / p99 17.0 us. ch582m is out of
this recipe's scope - its ring does not survive OpenOCD's attach-reset.