Auto merge of #14162 - eth3lbert:snapbox-m, r=weihanglo

test: migrate metabuild, metadata and net_config to snapbox

### What does this PR try to resolve?

Part of #14039.

Migrate following to snapbox:

- `tests/testsuite/metabuild.rs`
- `tests/testsuite/metadata.rs`
- `tests/testsuite/net_config.rs`

Author: bors