* Add STM32F103xD, STM32F103xG series and fix STM32F103xE startup file

* Add system_clock.c file for STM32F103xD series

* Add STM32F103xD and STM32F103xG to targets.json

* Update CMakeLists.txt to add STM32F103xD and STM32F103xG series

add_subdirectory(TARGET_STM32F103xD EXCLUDE_FROM_ALL)
add_subdirectory(TARGET_STM32F103xG EXCLUDE_FROM_ALL)

* Add remaps for STM32F1 timers as in original mbed-os

Added extra remaps for timers 9 to 14 for STM32F1 needed in STM32F103xG series

#define AFIO_REMAP_TIM9_ENABLE    17
#define AFIO_REMAP_TIM10_ENABLE   18
#define AFIO_REMAP_TIM11_ENABLE   19
#define AFIO_REMAP_TIM13_ENABLE   20
#define AFIO_REMAP_TIM14_ENABLE   21

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Co-authored-by: Perez <maperez@hp.com>