Default active low for TMC2130 DIAG1 (#10294)

- Added sanity check to require endstop inverting with SENSORLESS_HOMING

Marlin/stepper_indirection.cpp

@@ -188,7 +188,6 @@
     st.power_down_delay(128); // ~2s until driver lowers to hold current
     st.hysteresis_start(3);
     st.hysteresis_end(2);
-    st.diag1_active_high(1); // For sensorless homing
     #if ENABLED(STEALTHCHOP)
       st.stealth_freq(1); // f_pwm = 2/683 f_clk
       st.stealth_autoscale(1);