chore: replace remaining RuntimeGlobals references

[tthijm]

What kind of change does this PR introduce?

Closes #16897.

Did you add tests for your changes?

No.

Does this PR introduce a breaking change?

No.

What needs to be documented once your changes are merged?

N/A.

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: tthijm (927734f, e20205c, 704f0f4)

[webpack-bot]

For maintainers only:

• This needs to be documented (issue in webpack/webpack.js.org will be filed when merged)
• This needs to be backported to webpack 4 (issue will be created when merged)

[alexander-akait]

Thank you