filesystems/zerofs: update to 1.0.6

Upgrade ZeroFS to 1.0.6, make sure that protobuf is not built from
source but used as a dependency

Changelog:

• https://github.com/Barre/ZeroFS/releases/tag/v1.0.1
• https://github.com/Barre/ZeroFS/releases/tag/v1.0.2
• https://github.com/Barre/ZeroFS/releases/tag/1.0.3
• https://github.com/Barre/ZeroFS/releases/tag/v1.0.4
• https://github.com/Barre/ZeroFS/releases/tag/v1.0.5
• https://github.com/Barre/ZeroFS/releases/tag/v1.0.6

PR: 293206