[SC64][FW][SW] Controller rewrite to remove task subsystem + minor bug fixes

[Polprzewodnikowy]

This PR completely removes task.c / task.h from sw/controller STM32 code. Additionally, these changes were implemented:

• Updated IPL3
• Added new diagnostic data (voltage and temperature) readout commands for USB and N64
• Fixed some issues with FlashRAM save type
• Joybus timings were relaxed to accommodate communication with unsynchronized master controller (like Datel Game Killer, thanks @RWeick)
• N64 embedded test program now waits for release of button press to proceed
• Fixed issue where, in rare circumstances, I2C peripheral in STM32 would get locked-up on power-up
• LED blinking behavior on SD card access was changed
• LED blink duration on save writeback has been extended
• Minor fixes through the entire of hardware abstraction layer for STM32 code
• Primer now correctly detects issues with I2C bus during first time programming
• primer.py script gives more meaningful error messages
• Fixed bug where RTC time was always written on N64FlashcartMenu boot
• sc64deployer now displays "Diagnostic data" instead of "MCU stack usage"