Integrate latest STM32WL v1.1 FW package and support files

[elsalahy]

Summary:

Update our repo to use the latest FW package v.1.1 released by ST 0n 23/07/2021.
ST v1.1 STM32CubeWL MCU package and it's release notes indicate major changes that should be integrated within our repo.

Why do we need this?

To use the latest HAL and avoid debugging solved issues.

What is already there? What do you see now?

ST STM32WL 1.1 HAL layer release, see #88

What is missing? What do you want to see?

v1.1 Updated HAL and CMSIS and relevant tools

https://github.com/STMicroelectronics/STM32CubeWL

How do you propose to implement this?

• Update the subtree repo of the HAL layer.
• Pull subtree changes from master.

Environment:

OS and Baremetal.

Acceptance Criteria:

All applications function same as before.

What can you do yourself and what do you need help with?

All

[NicolasMrad]

is this still relevant?