Zephyr v3.4.0-rc1

The first release candidate for Zephyr 3.4.0 has been tagged:
https://github.com/zephyrproject-rtos/zephyr/releases/tag/v3.4.0-rc1

The merge window for features and enhancements is now closed for this
release, and it will remain closed until 3.4.0 is released.

We are now in the stabilisation phase, and only bug-fix, documentation
and stabilisation patches may be merged to the main branch. Additional
features and enhancements for the 3.4.0 release require approval by the
TSC.

You may continue to submit pull requests for new features in order to
gather feedback early or collaborate with others, but the release team
would like to encourage everyone to focus on testing and fixing bugs.

Release milestone dates:
https://github.com/zephyrproject-rtos/zephyr/wiki/Release-Management
Release process:
https://docs.zephyrproject.org/latest/project/release_process.html