Enable telemetry and I2C sensors on STM32WL (except accelerometers) (#7008)

* Update platformio inis for stm32 platform and wio-e5 variant for enabling i2c

* Don't reference timezone functions if MESHTASTIC_EXCLUDE_TZ is defined

* Use custom pow_of_two in RadioInterface instead of floating-point pow()

* First pass: enable sensors for STM32wL

* Fix AirQualityTelemetryModule being created if the PM25AQI header is missing

* Link in power sensor libraries

* more ini tweaks

* Add =1 to EXCLUDE defines, fix indentation.

* Drop HAS_WIRE in ini, it's defined in architecture.h

* Fix build when power sensor libraries are missing

Make MAX sensor integration into Power.cpp optional based on its library header existing.
Also make NullSensor expose a voltage and current sensor, because Power calls directly into these for INA sensors.
This lets us remove all the deps for the STM32WL platform.

* Change default I2C for RAK3172 to be I2C1, not I2C2

* Respect the laws of mathematics (oops)

src/modules/Telemetry/Sensor/nullSensor.h

@@ -4,9 +4,12 @@
 #pragma once
 
 #include "../mesh/generated/meshtastic/telemetry.pb.h"
-#include "TelemetrySensor.h"
 
-class NullSensor : public TelemetrySensor
+#include "CurrentSensor.h"
+#include "TelemetrySensor.h"
+#include "VoltageSensor.h"
+
+class NullSensor : public TelemetrySensor, VoltageSensor, CurrentSensor
 {
 
   protected:
@@ -17,6 +20,9 @@ class NullSensor : public TelemetrySensor
     virtual int32_t runOnce() override;
     virtual bool getMetrics(meshtastic_Telemetry *measurement) override;
     int32_t runTrigger() { return 0; }
+
+    virtual uint16_t getBusVoltageMv() override;
+    virtual int16_t getCurrentMa() override;
 };
 
 #endif