Build: symlinking breaks 'git clean'

[markfields]

Describe the bug

After symlinking, running git clean -fdX hits a bunch of failure like this, from infinitely nested node_modules paths as it navigates through symlinks:

warning: Could not stat path 'examples/components/flow-scroll/node_modules/@microsoft/fluid-component-base/node_modules/@microsoft/fluid-map/node_modules/@microsoft/fluid-runtime-definitions/node_modules/@microsoft/fluid-driver-definitions/tsconfig.esnext.tsbuildinfo': Filename too long

[markfields]

We should almost definitely just close this, but I wanted to bring it to your attention. Thanks.

[arinwt]

I think this is an issue with git for windows. I opened an issue a while back:
git-for-windows/git#2298

[curtisman]

This is a problem even with lerna's only symlink, We can't use git clean on windows.