Add'l PLR options, AVR strstr_P compat (#13880)

Marlin/Configuration_adv.h

Marlin/src/HAL/shared/Marduino.h

Marlin/src/feature/power_loss_recovery.cpp

Marlin/src/feature/power_loss_recovery.h

buildroot/share/tests/DUE-tests

buildroot/share/tests/LPC1768-tests

buildroot/share/tests/LPC1769-tests

buildroot/share/tests/STM32F1-tests

buildroot/share/tests/esp32-tests

buildroot/share/tests/megaatmega2560-tests

config/default/Configuration_adv.h

config/examples/3DFabXYZ/Migbot/Configuration_adv.h

config/examples/AlephObjects/TAZ4/Configuration_adv.h

config/examples/AliExpress/UM2pExt/Configuration_adv.h

config/examples/Anet/A2/Configuration_adv.h

config/examples/Anet/A2plus/Configuration_adv.h

config/examples/Anet/A6/Configuration_adv.h

config/examples/Anet/A8/Configuration_adv.h

config/examples/AnyCubic/i3/Configuration_adv.h

config/examples/ArmEd/Configuration_adv.h