Fix remaining CommonJS imports after Rollup upgrade (#26473)

Follow-up to https://github.com/facebook/react/pull/26442.

It looks like we missed a few cases where we default import a CommonJS
module, which leads to Rollup adding `.default` access, e.g.
`require('webpack/lib/Template').default` in the output.

To fix, add the remaining cases to the list of exceptions. Verified by
going through all `externals` in the bundle list, and manually checking
the webpack plugin.