[hack] Run liveness linter on manual sections of partially generated files
[hack] Run liveness linter on manual sections of partially generated files

Summary: At the moment, we always skip partially-generated files. With this diff, we lint everything between the BEGIN/END MANUAL SECTION comments.

Reviewed By: fahndrich

Differential Revision: D14326013

fbshipit-source-id: 0b1eb6e0b2b4f1e9dd8a8b1bdf49fd9202fb97c8

nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow,nmote/flow