Ability to select a name for project.json files

[khludenevav]

I'm inside a big monorepo. And currently my nx.json is placed in <repoRoot>/client.
I'm want to move nx.json to repo root and nx stop working because there are about 50 files in monorepo which have name project.json. Nx can't parse them and fails.
The idea is to somehow restrict glob how Nx searches project.json files, or add ability to change these file names for example to nx_project.json.
I believe it also speedup project parse, because now nx graph after nx reset executes about 20 seconds.

I can't use .nxignore because some of these files are inputs for targets.

Probably we can start to add options to change glob in getDefaultPlugins (packages/nx/src/project-graph/plugins/internal-api.ts)
plugin ../../plugins/project-json/build-nodes/project-json.

[khludenevav]

@FrozenPandaz (mentioned as last editor for project-json plugin #26952)
I wanted to get input for this request. Maybe it goes against nx direction at all.
For me seems it can be relatively simple enough to implement, probably as the first step - through environment variable.