[sx1278] Driver improvements

• Improved fsk driver, and bringed it on-par with LoRa driver
• Added FIFO support to LoRa driver, now allowing up to 256 bytes long packets
• General interface improvements
  • Moved frontends into separate interface
  • Removed pa_boost from config as it is easy to mess up
  • Removed spi configuration from parameters as it is easy to mess up
  • No longer is the caller required to setup interrupts, as they require a complicated setup
• Removed DIO number from interrupt and improved interrupts handling, making it more reliable
• Improved test entrypoints, removing some duplication between lora and fsk