feat(core): Make physical layout key rotation optional

[petejohanson]

To be able to save on flash space, for layouts on space constrained devices that don't require rotation, make key rotation props optional behind a new Kconfig flag.

PR check-list

• Branch has a clean commit history
• Additional tests are included, if changing behaviors/core code that is testable.
• Proper Copyright + License headers added to applicable files (Generally, we stick to "The ZMK Contributors" for copyrights to help avoid churn when files get edited)
• Pre-commit used to check formatting of files, commit messages, etc.
• Includes any necessary documentation changes.