fix: Pass `chunkGraph` through in `generate` function

[pgoldberg]

This PR contains:

• [ ] bugfix
• [x] feature
• [ ] refactor
• [ ] documentation
• [ ] other

Are tests included?

• [x] yes (bugfixes and features will not be merged without tests)
• [ ] no

Breaking Changes?

• [ ] yes (breaking changes will not be merged unless absolutely necessary)
• [x] no

If yes, then include "BREAKING CHANGES:" in the first commit message body, followed by a description of what is breaking.

List any relevant issue numbers:

Description

Webpack 5 deprecated a lot of the APIs that exist on chunks, and instead prefers the use of the ChunkGraph API. We have a few places where we use now-deprecated APIs in our usage of the WebpackManifestPlugin, and would like to move those over to using the ChunkGraph API.

This PR passes through the chunkGraph in the generate function

[shellscape]

Thanks for the PR. Looks like a failing test is holding this up.

[pgoldberg]

@shellscape Thanks for reviewing! Sorry this fell off my radar a little bit – just fixed up the test issue 🙂