Newer versions of setuptools_scm depend on tomli, so we need to include that in our autoinstaller.
<rdar://problem/115851645>
Pull request: https://github.com/WebKit/WebKit/pull/18027
Committed 268269@main (530fa2b998ab): <https://commits.webkit.org/268269@main> Reviewed commits have been landed. Closing PR #18027 and removing active labels.