Fix SSD1306 build

[julianneswinoga]

Fixes #262

• Updated CI to build with INFO_DISPLAY_TYPE, but only for mksgenlv21 and esp32
  • Needed to add in some more constraints based on the firmware:
  • AVR-based boards can only have DISPLAY_TYPE OR INFO_DISPLAY_TYPE, not both
  • MKS Gen L-based boards can't have INFO_DISPLAY_TYPE and a focus motor (from their pin configuration)
• Fix the https://github.com/ClutchplateDude/esp8266-oled-ssd1306#4.6.0 tag specifier, because the 4.6.0 tag is before @ClutchplateDude fixed the library. 4.6.2 tag is now correct.
• Apparently the esp32 build with INFO_DISPLAY_TYPE_I2C_SSD1306_128x64 was just broken? pgm_read_byte() on esp32 (which is just a pointer cast because esp32 doesn't actually have PROGMEM) does a useless cast which fails with our warning flags

[ClutchplateDude]

Nice.