Feature/GNSE_LPM

[elsalahy]

Summary:

This adds an improved low power manager that allows applications to reduce power consumption significantly. The LPM also provides multiple APIs and Reduces the amount of configuration needed to reach low power. Closes #171 Closes #142

Changes:

• Removed deprecated underlying utility STM32_lpm.h
• Added multipled APIs to GNSE_lpm.h to handle device peripherals
• Updated applications and config to use new GNSE_lpm.h

Notes for Reviewers:

• To reach lowest power consumption, disable the debugger and tracer using the conf file.
• freefall_lorawan needs more optimization and we have #180 for this.
• This app could break things, so please avoid nitpicking and please focus on functionally and API changes

Release Notes: (optional)

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[elsalahy]

@marnixcro it would be appreciated if you could test the entire functionality of the following applications in your testing

• freefall_lorawan
• sensors_lorawan

I already tested

• basic_lorawan
• secure_element_lorawan

also all applications compile using CMAKE and STM32CubeIDE

[elsalahy]

@marnixcro awesome, I also took care of the nitpicks 🚀