Upgrade ninja from 1.10.2 to 1.12.1

[gudnimg]

I'm proposing to update Ninja in the Prusa-Firmware repo. This PR is simply a proposal to keep the MMU project in sync as well.

The update brings better support for Windows :) This doesn't fix any reported issues on our side, but I don't see any harm in keeping up with the latest changes and improvements.

Some highlights:

• Ninja uses UTF-8 now on Windows (previous versions used local ANSI encoding)
• Support for path lengths over 260 characters on Windows

Additionally fixed one DeprecationWarning raised by Python 3.12.4 when running bootstrap.py.

Changelogs:

• https://github.com/ninja-build/ninja/releases/tag/v1.12.1
• https://github.com/ninja-build/ninja/releases/tag/v1.12.0
• https://github.com/ninja-build/ninja/releases/tag/v1.11.1
• https://github.com/ninja-build/ninja/releases/tag/v1.11.0

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