🐛 Fix Trigorilla Pro HAL/STM32 build offset (#22761)

ini/stm32f1.ini

 extends              = stm32_variant
 board                = genericSTM32F103ZE
 board_build.variant  = MARLIN_F103Zx
-board_build.offset   = 0x7000
 build_flags          = ${stm32_variant.build_flags}
                        -DENABLE_HWSERIAL3 -DTIMER_SERIAL=TIM5
 build_unflags        = ${stm32_variant.build_unflags}