lib/stm32wba/hci Moving HAL based funcs into stm32wba hci part

Moving HAL based funcs from zephyr to hal stm32wba hci part.
In this way we separate zephyr based adaptation code from pure
HAL code.

(cherry picked from commit 019d8255333f96bdd47d26b44049bd3e7af8ef55)

Original-Signed-off-by: Alessandro Manganaro <alessandro.manganaro@st.com>
GitOrigin-RevId: 019d8255333f96bdd47d26b44049bd3e7af8ef55
Cr-Build-Id: 8732568629643562881
Cr-Build-Url: https://cr-buildbucket.appspot.com/build/8732568629643562881
Copybot-Job-Name: zephyr-hal_stm32-copybot-downstream
Change-Id: I494f1190e945edcd2c714f5479ee5102c71ff010
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/hal_stm32/+/5968598
Tested-by: ChromeOS Prod (Robot) <chromeos-ci-prod@chromeos-bot.iam.gserviceaccount.com>
Reviewed-by: Ting Shen <phoenixshen@chromium.org>
Commit-Queue: Ting Shen <phoenixshen@chromium.org>