License handler lock file issues

https://github.com/GraphiteEditor/Graphite/blob/d90a49aa423d0a6c94a7479547e605f33401b130/tools/third-party-licenses/src/cargo.rs#L89

The `--frozen` argument here regularly trips up any attempts to build this app ... ironically I'm trying to make the build work properly offline, but fetching locked dependencies ahead of time does not work because whatever lock file this references is used in any top level fetch we seem to be able to do.

If there is some command we can run for a source preparation faze to correctly get what this is going to need so that the later build phase actually works with this argument, can that be documented somewhere? I didn't see it poking around anywhere yet.