[clang-format] Add a space between an overloaded operator and '>'

[clang-format] Add a space between an overloaded operator and '>'

The token annotator doesn't annotate the template opener and closer
as such if they enclose an overloaded operator. This causes the
space between the operator and the closer to be removed, resulting
in invalid C++ code.

Fixes #58602.

Differential Revision: https://reviews.llvm.org/D143755