tests-functional/ -> test/functional/
tests-unit-network/ -> test/unit-network/
No Go code changes beyond the two package paths. Every reference follows:
Makefile targets, the pytest-lint and reliability workflows, the three
Jenkinsfiles, the root Dockerfile, pyrightconfig.json, .gitignore, the
benchmark and functional-test scripts, and the docs.
All paths inside the moved directories are self-contained (docker compose
uses `context: .`, the Python helpers resolve from __file__), so the extra
level of nesting does not reach outside.
refs #7067
