[clang-format] [PR45626] SpacesInAngles does not insert or preserve leading...

[clang-format] [PR45626] SpacesInAngles does not insert or preserve leading space before :: operator

Summary:
See https://bugs.llvm.org/show_bug.cgi?id=45626

Ensure space between < and ::

(void)static_cast<::std::uint32_t >(1);

Reviewers: krasimir, mitchell-stellar

Reviewed By: krasimir

Subscribers: cfe-commits

Tags: #clang, #clang-format

Differential Revision: https://reviews.llvm.org/D79172