Include mac80211_hwsim module in Docker development environment image.

[abeltrano]

This pull request includes changes related to building and configuring the mac80211_hwsim kernel module in the Docker environment. The most important changes include adding a new shell script to build the module and modifying the Dockerfile to include the necessary packages and execute the build script.

Main changes:

• .docker/netremote-dev/build-mac80211_hwsim-kmod.sh: Added a new shell script to build the mac80211_hwsim kernel module.
• .docker/netremote-dev/Dockerfile: Added the kmod package to the Dockerfile and modified it to copy and execute the build-mac80211_hwsim-kmod.sh script before the entrypoint script. [1] [2]