[Bug] Fix layer_state restoration at end of dynamic macro feature #16208

[jmdesprez]

By doing so, methods like 'layer_state_set_user' will be called, ensuring a correct behavior.

Description

This is a fix for #16208.

Restoring the layer state using layer_state = saved_layer_state doesn't call methods like layer_state_set_user leading to strange behavior (like shutting down the leds on the moonlander)

Types of Changes

• Core
• Bugfix
• New feature
• Enhancement/optimization
• Keyboard (addition or update)
• Keymap/layout/userspace (addition or update)
• Documentation

Issues Fixed or Closed by This PR

• [Bug] layer_state_set_user not called when dynamic macro restore the layer_state #16208

Checklist

• My code follows the code style of this project: C, Python
• I have read the PR Checklist document and have made the appropriate changes.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• I have tested the changes and verified that they work and don't break anything (as well as I can manage).

Note regarding tests: the original fix has been made on the zsa fork. A firmware has been build and tested layer_state_set_user is now called two times (from layer 0 then go back to actual layer)

To make this PR I've:

• checkout the master branch
• cherry picked the fix
• make test:all (everything is OK)