rework sensor instantiation to saves memory by removing the static allocation (#8054)

* rework I2C sensor init

the goal is to only instantiate sensors that are pressend to save memory.
side effacts:
 - easyer sensor integration (less C&P code)
 - nodeTelemetrySensorsMap can be removed when all devices are migrated

* add missing ifdef

* refactor a bunch of more sensors

RAM -816
Flash -916

* fix build for t1000

* refactor more sensors

RAM -192
Flash -60

* improve error handling

Flash -112

* fix build

* fix build

* fix IndicatorSensor

* fix tracker-t1000-e build

not sure what magic is used but it works

* Apply suggestion from @Copilot

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Apply suggestion from @Copilot

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Apply suggestion from @Copilot

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update src/modules/Telemetry/Sensor/DFRobotGravitySensor.h

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Fix

---------

Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

src/modules/Telemetry/Sensor/VEML7700Sensor.cpp

@@ -11,23 +11,22 @@
 
 VEML7700Sensor::VEML7700Sensor() : TelemetrySensor(meshtastic_TelemetrySensorType_VEML7700, "VEML7700") {}
 
-int32_t VEML7700Sensor::runOnce()
+bool VEML7700Sensor::initDevice(TwoWire *bus, ScanI2C::FoundDevice *dev)
 {
     LOG_INFO("Init sensor: %s", sensorName);
-    if (!hasSensor()) {
-        return DEFAULT_SENSOR_MINIMUM_WAIT_TIME_BETWEEN_READS;
+    status = veml7700.begin(bus);
+    if (!status) {
+        return status;
     }
-    status = veml7700.begin(nodeTelemetrySensorsMap[sensorType].second);
 
     veml7700.setLowThreshold(10000);
     veml7700.setHighThreshold(20000);
     veml7700.interruptEnable(true);
 
-    return initI2CSensor();
+    initI2CSensor();
+    return status;
 }
 
-void VEML7700Sensor::setup() {}
-
 /*!
  *    @brief Copmute lux from ALS reading.
  *    @param rawALS raw ALS register value