8 migration should not add `e2e/browserlist`

[filipesilva]

Projects created with CLI 7 have two default projects: project-name and project-name-e2e. But projects created with CLI 8 only have project-name and a e2e target inside it instead.

The differential-loading migration adds e2e/browserslist, but shouldn't. We should either ignore the old e2e project or roll it into project-name like the current configs do.

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