RTC: PCF85063 support, port to SensorLib 0.3.1 (#8061)

* RTC: PCF85063 support, port to SensorLib 0.3.1

* Tidy up defines

* Remove RTC/PCF8563 mentions from unrelated variants

* Bump SensorLib 0.3.2

* Use SensorRtcHelper

* Consistent warning message

* Fix oversight

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

---------

Co-authored-by: Manuel <71137295+mverch67@users.noreply.github.com>
Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

variants/nrf52840/heltec_mesh_solar/platformio.ini

@@ -15,8 +15,6 @@ lib_deps =
   ${nrf52840_base.lib_deps}
   # renovate: datasource=git-refs depName=NMIoT-meshsolar packageName=https://github.com/NMIoT/meshsolar gitBranch=main
   https://github.com/NMIoT/meshsolar/archive/dfc5330dad443982e6cdd37a61d33fc7252f468b.zip
-  # renovate: datasource=custom.pio depName=PCF8563 packageName=lewisxhe/library/PCF8563_Library
-  lewisxhe/PCF8563_Library@1.0.1
   # renovate: datasource=custom.pio depName=ArduinoJson packageName=bblanchon/library/ArduinoJson
   bblanchon/ArduinoJson@6.21.4
 

variants/nrf52840/heltec_mesh_solar/variant.h

@@ -142,7 +142,6 @@ No longer populated on PCB
 #define BQ4050_SCL_PIN (32 + 0)                // I2C clock line pin
 #define BQ4050_EMERGENCY_SHUTDOWN_PIN (32 + 3) // Emergency shutdown pin
 
-#define HAS_RTC 0
 #ifdef __cplusplus
 }
 #endif